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Roger J Smith

C.E.T. averages and extremes, 1772 to 2018 (updated)

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Over six years ago I posted some files that show averages and extremes for the C.E.T. daily data period 1772 to present. As I cannot edit those files, I am now going to replace the thread with updated versions. Note to any moderators, I will need full access to the old thread until this work is complete so please don't hide it away (yet) in any archives. 

 

Mean Daily C.E.T. for the entire period of record 1772-2018

DATE ... MONTH

<<>>...JAN .... FEB .... MAR ... APR .... MAY .... JUN .... JUL ....AUG .... SEP .... OCT ....NOV .... DEC

01 ..... 3.37 .... 3.93 .... 4.55 .... 6.79 .... 9.47 .. 13.32 .. 15.53 .. 16.13 .. 14.66 .. 11.85 .... 8.03 .... 5.07

02 ..... 3.36 .... 3.85 .... 4.76 .... 7.00 .... 9.74 .. 13.56 .. 15.60 .. 16.12 .. 14.84 .. 11.68 .... 7.94 .... 5.03

03 ..... 3.21 .... 3.96 .... 4.73 .... 7.00 .... 9.76 .. 13.56 .. 15.59 .. 16.14 .. 14.68 .. 11.57 .... 7.74 .... 5.06

04 ..... 3.41 .... 3.98 .... 4.68 .... 7.09 .... 9.93 .. 13.70 .. 15.71 .. 16.13 .. 14.55<..11.43 .... 7.43 .... 5.06

05 ..... 3.27 .... 4.09 .... 4.78 .... 7.12 .. 10.18 .. 13.72 .. 15.87 .. 16.18 .. 14.52 .. 11.19 .... 7.45 .... 5.14

06 ..... 3.39 .... 4.11 .... 4.95 .... 7.30 .. 10.35 .. 13.70 .. 15.76 .. 16.04 .. 14.46 .. 11.23 .... 7.10 .... 4.85<

07 ..... 3.22 .... 4.21 .... 5.01 .... 7.45 .. 10.56 .. 13.76 .. 15.83 .. 16.01 .. 14.42 .. 11.14 .... 6.95<....4.65<

08 ..... 3.30 .... 3.95 .... 4.89 .... 7.40 .. 10.61 .. 13.80 .. 15.79 .. 15.99 .. 14.27 .. 10.95 .... 6.81 .... 4.43

09 ..... 3.42 .... 3.91 .... 4.71 .... 7.30 .. 10.48 .. 13.93 .. 15.81 .. 15.99 .. 14.12 .. 10.77 .... 6.60 .... 4.24

10 ..... 3.48 .... 3.91 .... 4.90 .... 7.54 .. 10.60 .. 13.86 .. 15.91 .. 16.07 .. 13.99 .. 10.92 .... 6.68 .... 4.31

11 ..... 3.34 .... 3.76 .... 5.12 .... 7.66 .. 10.82 .. 13.96 .. 16.09 .. 16.07 .. 13.93 .. 10.66 .... 6.83 .... 4.17

12 ..... 3.13 .... 3.69 .... 5.01 .... 7.74 .. 11.12 .. 14.05 .. 16.23 .. 16.21 .. 13.71 .. 10.39 .... 6.56 .... 4.32

13 ..... 3.33 .... 3.64 .... 5.06 .... 7.67 .. 11.11 .. 14.20 .. 16.31 .. 16.12 .. 13.59 .. 10.14 .... 6.37 .... 4.45

14 ..... 3.34 .... 3.74 .... 5.29 .... 8.05 .. 11.14 .. 14.20 .. 16.28 .. 16.02 .. 13.47 .. 10.15<....6.13 .... 4.46

15 ..... 3.25 .... 4.01 .... 5.48 .... 8.30 .. 11.13 .. 14.26 .. 16.25<..15.91 .. 13.38 .... 9.95 .... 5.95 .... 4.42

16 ..... 3.38 .... 3.93 .... 5.69 .... 8.22 .. 11.29 .. 14.32 .. 16.22 .. 15.74 .. 13.41 .... 9.70 .... 5.81 .... 4.35

17 ..... 3.37 .... 3.80 .... 5.68 .... 8.15 .. 11.34 .. 14.50 .. 16.17 .. 15.72 .. 13.51 .... 9.80 .... 5.55 .... 4.42

18 ..... 3.34 .... 3.80 .... 5.73 .... 8.21 .. 11.34 .. 14.54 .. 16.25<..15.78 .. 13.29 .... 9.68 .... 5.62 .... 4.41

19 ..... 3.46 .... 3.81 .... 5.75<... 8.35<..11.37 .. 14.58 .. 16.27 .. 15.70 .. 13.03 .... 9.61 .... 5.59 .... 4.06

20 ..... 3.29 .... 3.79 .... 5.98 .... 8.57 .. 11.63 .. 14.73 .. 16.25<..15.65 .. 12.86 .... 9.42 .... 5.49 .... 3.96

21 ..... 3.48 .... 4.19 .... 5.90 .... 8.95 .. 11.80 .. 14.76 .. 16.15<..15.54 .. 12.56 .... 9.47 .... 5.61 .... 4.02

22 ..... 3.57 .... 4.40 .... 5.92 .... 8.98 .. 12.00 .. 14.87 .. 16.16 .. 15.53 .. 12.58 .... 9.31 .... 5.48 .... 3.99

23 ..... 3.55<... 4.52 .... 6.06 .... 8.96 .. 12.25<..14.82 .. 16.18 .. 15.26 .. 12.51 .... 9.06 .... 5.48 .... 3.94

24 ..... 3.58 .... 4.47 .... 6.22 .... 8.97 .. 12.46 .. 14.91 .. 16.16 .. 15.29 .. 12.48 .... 8.88 .... 5.38 .... 3.84

25 ..... 3.48 .... 4.53 .... 6.25 .... 8.95 .. 12.38 .. 15.07 .. 16.19 .. 15.19 .. 12.36 .... 8.56 .... 5.28 .... 3.54

26 ..... 3.54 .... 4.51 .... 6.15<... 8.97 .. 12.38 .. 15.20 .. 16.18 .. 15.19 .. 12.33 .... 8.27 .... 5.32 .... 3.50

27 ..... 3.68 .... 4.62 .... 6.27 .... 8.86 .. 12.54 .. 15.15 .. 16.03 .. 15.04 .. 12.29 .... 8.33 .... 5.08 .... 3.48

28 ..... 3.60 .... 4.50 .... 6.39 .... 8.95 .. 12.68 .. 15.28 .. 16.07 .. 15.04 .. 12.07 .... 8.34 .... 5.23 .... 3.47

29 ..... 3.77 .... 4.55 .... 6.50 .... 9.01 .. 12.61 .. 15.27 .. 16.19 .. 14.92 .. 12.06 .... 8.02 .... 5.09 .... 3.71

30 ..... 3.78 .... xxxx .... 6.72 .... 9.40 .. 12.79 .. 15.27 .. 16.23 .. 14.89 .. 11.95<....8.14 .... 5.04 .... 3.67

31 ..... 3.96 .... xxxx .... 6.80 .... xxxx .. 12.96 ... xxxx .. 16.15 .. 14.63 ... xxxx .... 8.20 .... xxxx .... 3.54

Month . 3.44 ... 4.06 ... 5.55<....8.10 .. 11.32 .. 14.36 .. 16.05<..15.69 .. 13.40 .... 9.90 .... 6.19 .... 4.25<

<<>> ... JAN .... FEB.... MAR .... APR.... MAY .... JUN.... JUL .... AUG ....SEP .... OCT ....NOV .... DEC

Conversion to one decimal _ it is only an issue if the second decimal is five, which way to round from all not-shown decimals ...

so I have marked those rounding down (instead of up which most readers would do) with this symbol <

any entries ending in a 5 (second decimal) without the < can be rounded up when converting to one decimal. 

Note also: Dec 1786 daily data does not exist, the table has the monthly mean of 2.8 throughout. You could assume that the

averages produced should perhaps be adjusted (higher by .02 at start of month to lower by .02 at end) if Dec 1786 ran generally

milder to colder temperatures. Also, monthly averages for February are adjusted slightly for frequency of leap year days. 

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C.E.T. daily means for 1981-2010

DATE ... MONTH

<<>>...JAN .... FEB .... MAR .... APR ....MAY .... JUN .... JUL ....AUG .... SEP .... OCT ....NOV .... DEC

01 ..... 4.45 .... 4.44 .... 4.97 .... 8.26 .. 10.74 .. 13.38 .. 15.97 .. 16.82 .. 15.38 .. 12.77 .... 9.40 .... 5.49

02 ..... 4.58 .... 4.52 .... 4.79 .... 8.01 .. 10.35 .. 13.69 .. 15.99 .. 16.80 .. 15.44 .. 12.35 .... 9.06 .... 5.61

03 ..... 4.34 .... 4.70 .... 5.05 .... 7.30 .. 10.38 .. 13.27 .. 15.89 .. 16.93 .. 15.38 .. 12.17 .... 9.11 .... 5.96

04 ..... 4.38 .... 5.09 .... 4.75 .... 7.05 .. 10.36 .. 13.15 .. 16.09 .. 16.88 .. 14.82 .. 11.94 .... 8.64 .... 6.11

05 ..... 4.64 .... 5.29 .... 5.42 .... 7.19 .. 10.51 .. 13.30 .. 16.45 .. 17.20 .. 15.29 .. 11.75 .... 8.22 .... 6.26

06 ..... 4.61 .... 5.49 .... 6.32 .... 7.43 .. 10.93 .. 13.75 .. 16.41 .. 17.13 .. 15.12 .. 11.95 .... 8.08 .... 5.07

07 ..... 3.45 .... 4.89 .... 6.55 .... 7.30 .. 10.90 .. 14.08 .. 16.25 .. 16.74 .. 15.08 .. 11.83 .... 8.32 .... 4.85

08 ..... 3.99 .... 4.45 .... 6.47 .... 7.06 .. 10.77 .. 13.99 .. 16.42 .. 16.67 .. 15.07 .. 11.95 .... 8.76 .... 4.36

09 ..... 4.31 .... 4.02 .... 6.27 .... 7.30 .. 10.70 .. 14.09 .. 16.19 .. 16.87 .. 14.79 .. 11.97 .... 8.18 .... 4.34

10 ..... 4.45 .... 4.13 .... 6.83 .... 8.12 .. 10.72 .. 14.32 .. 16.60 .. 16.80 .. 14.63 .. 12.22 .... 8.06 .... 4.27

11 ..... 4.36 .... 4.27 .... 6.51 .... 8.01 .. 10.97 .. 13.71 .. 16.67 .. 16.73 .. 14.82 .. 11.58 .... 8.25 .... 4.19

12 ..... 4.26 .... 4.77 .... 5.90 .... 7.77 .. 11.22 .. 13.92 .. 16.49 .. 16.82 .. 14.39 .. 11.37 .... 8.18 .... 4.28

13 ..... 4.54 .... 4.00 .... 6.23 .... 7.56 .. 11.59 .. 14.02 .. 16.55 .. 16.37 .. 13.89 .. 11.22 .... 7.23 .... 4.62

14 ..... 4.49 .... 3.36 .... 6.53 .... 7.99 .. 11.63 .. 14.27 .. 16.76 .. 16.85 .. 13.74 .. 10.80 .... 6.89 .... 4.48

15 ..... 4.66 .... 3.57 .... 6.99 .... 8.25 .. 11.68 .. 14.21 .. 16.99 .. 16.91 .. 13.63 .. 10.74 .... 6.81 .... 4.57

16 ..... 4.75 .... 3.63 .... 6.89 .... 8.60 .. 11.38 .. 14.85 .. 16.72 .. 16.63 .. 13.86 .. 10.25 .... 6.79 .... 4.53

17 ..... 4.45 .... 3.66 .... 7.43 .... 8.41 .. 11.36 .. 15.04 .. 16.27 .. 16.58 .. 13.90 .... 9.87 .... 6.23 .... 4.44

18 ..... 4.35 .... 3.81 .... 7.09 .... 8.11 .. 11.53 .. 14.87 .. 16.45 .. 16.46 .. 13.80 .. 10.00 .... 6.65 .... 4.34

19 ..... 4.89 .... 4.07 .... 6.68 .... 8.11 .. 11.93 .. 15.26 .. 16.88 .. 16.88 .. 13.64 .. 10.00 .... 6.32 .... 4.30

20 ..... 5.04 .... 3.95 .... 6.54 .... 8.39 .. 12.32 .. 14.98 .. 17.08 .. 16.77 .. 14.02 .... 9.74 .... 5.99 .... 3.75

21 ..... 4.98 .... 4.23 .... 6.61 .... 9.08 .. 12.17 .. 14.50 .. 16.81 .. 16.36 .. 13.63 .... 9.77 .... 5.67 .... 4.30

22 ..... 4.35 .... 4.25 .... 6.91 .... 9.36 .. 12.19 .. 14.61 .. 16.78 .. 16.43 .. 13.69 .... 9.57 .... 5.74 .... 4.45

23 ..... 4.44 .... 4.33 .... 6.95 .... 9.64 .. 12.86 .. 14.90 .. 16.78 .. 16.11 .. 13.42 .... 9.61 .... 5.76 .... 4.69

24 ..... 4.58 .... 4.58 .... 7.41 .... 9.64 .. 13.35 .. 14.91 .. 16.47 .. 16.08 .. 12.76 .... 9.36 .... 6.00 .... 4.68

25 ..... 4.21 .... 4.21 .... 7.33 .. 10.15 .. 12.45 .. 15.31 .. 17.03 .. 15.78 .. 12.73 .... 9.39 .... 6.20 .... 4.50

26 ..... 4.16 .... 4.80 .... 7.22 .. 10.02 .. 12.50 .. 15.33 .. 17.20 .. 15.73 .. 12.79 .... 9.54 .... 6.06 .... 4.34

27 ..... 4.30 .... 5.21 .... 6.98 .. 10.03 .. 12.26 .. 15.60 .. 17.07 .. 15.42 .. 12.70 .... 9.73 .... 5.88 .... 4.08

28 ..... 4.40 .... 5.19 .... 7.19 .... 9.84 .. 12.49 .. 15.56 .. 17.28 .. 15.17 .. 13.18 .... 9.63 .... 5.57 .... 4.22

29 ..... 4.69 .... 4.43* ... 7.20 .... 9.85 .. 12.76 .. 15.95 .. 17.67 .. 15.22 .. 13.03 .... 8.73 .... 5.32 .... 4.04

30 ..... 4.28 .... xxxx .... 7.57 .. 10.39 .. 13.09 .. 15.88 .. 17.47 .. 15.47 .. 12.73 .... 9.12 .... 5.58 .... 4.23

31 ..... 4.56 .... xxxx .... 7.93 .... xxxx .. 13.23 .. xxxxx .. 17.15 .. 15.10 .. xxxxx .... 9.18 .... xxxx .... 4.29

 

Month . 4.45 .... 4.39 .... 6.56 .... 8.47 .. 11.66 .. 14.49 .. 16.67 .. 16.41 .. 14.04 .. 10.65 .... 7.10 .... 4.63

>>> .... JAN .... FEB .... MAR .... APR .... MAY ... JUN .... JUL .... AUG .... SEP .... OCT ....NOV .... DEC

 

* leap year day, 7 cases ... Feb monthly is 4.39 whether you weight leap year day or not.

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Dalton minimum 30-year averages

1795 to 1824

This table can be compared to the first two, showing how cold the winter climate can be for a 30-year period. I chose the coldest possible 30-year winter period, 1795-1824 ... the Dalton is usually held to be about 1794 to 1834 spanning three rather weak solar cycles that peaked around 1801, 1816 and 1830. This chosen period may not be the coldest for other parts of the year. However, it does give you an idea how cold a non-glacial period can become, with some days showing averages below 2.0 deg C.

DATE ... MONTH

<<>>...JAN .... FEB .... MAR .... APR ....MAY .... JUN .... JUL ....AUG .... SEP .... OCT ....NOV ....DEC

01 ..... 2.10 .... 3.67 .... 4.31 .... 6.50 .... 9.76 .. 13.35 .. 14.87 .. 15.86 .. 14.42 .. 11.05 .... 7.98 .... 4.55

02 ..... 2.24 .... 3.66 .... 4.81 .... 6.58 .. 10.23 .. 13.57 .. 15.07 .. 15.72 .. 14.80 .. 11.33 .... 8.00 .... 3.98

03 ..... 1.83 .... 3.73 .... 5.02 .... 6.46 .. 10.21 .. 13.66 .. 14.75 .. 16.34 .. 15.14 .. 11.57 .... 6.92 .... 4.09

04 ..... 2.09 .... 3.28 .... 4.68 .... 6.51 .. 10.11 .. 13.70 .. 14.98 .. 15.65 .. 14.78 .. 11.63 .... 5.85 .... 4.73

05 ..... 2.45 .... 3.54 .... 4.14 .... 6.61 .. 10.60 .. 13.52 .. 15.00 .. 15.61 .. 14.28 .. 11.21 .... 6.06 .... 4.19

06 ..... 2.92 .... 3.68 .... 3.76 .... 6.90 .. 10.97 .. 13.22 .. 14.90 .. 15.58 .. 14.30 .. 11.19 .... 6.18 .... 3.66

07 ..... 2.38 .... 3.66 .... 3.89 .... 7.30 .. 11.35 .. 13.62 .. 15.19 .. 15.34 .. 13.90 .. 11.04 .... 6.48 .... 3.25

08 ..... 2.47 .... 3.44 .... 4.07 .... 7.43 .. 11.40 .. 13.80 .. 15.22 .. 15.75 .. 13.68 .. 10.83 .... 6.33 .... 3.01

09 ..... 2.61 .... 4.36 .... 3.84 .... 7.16 .. 10.91 .. 13.80 .. 15.47 .. 15.63 .. 13.73 .. 10.42 .... 6.07 .... 2.96

10 ..... 2.48 .... 4.53 .... 4.01 .... 7.35 .. 10.66 .. 13.69 .. 15.63 .. 15.84 .. 13.55 .. 10.07 .... 6.22 .... 2.74

11 ..... 2.39 .... 4.23 .... 4.22 .... 7.05 .. 10.64 .. 13.63 .. 15.94 .. 16.29 .. 13.66 .. 10.14 .... 6.55 .... 3.22

12 ..... 1.87 .... 3.91 .... 4.72 .... 6.98 .. 10.49 .. 13.39 .. 15.95 .. 16.13 .. 13.12 .... 9.56 .... 6.96 .... 3.30

13 ..... 2.25 .... 3.42 .... 4.47 .... 7.38 .. 10.17 .. 13.99 .. 15.98 .. 15.93 .. 13.13 .... 9.50 .... 6.08 .... 3.01

14 ..... 2.65 .... 3.02 .... 5.06 .... 7.74 .. 10.15 .. 14.43 .. 15.85 .. 15.74 .. 13.99 .... 9.48 .... 5.91 .... 3.05

15 ..... 1.73 .... 3.34 .... 5.18 .... 8.40 .. 10.65 .. 13.87 .. 15.64 .. 15.79 .. 14.23 .... 9.44 .... 5.76 .... 3.05

16 ..... 1.98 .... 3.53 .... 5.04 .... 8.29 .. 11.07 .. 13.91 .. 15.68 .. 15.53 .. 13.67 .... 8.92 .... 5.74 .... 3.51

17 ..... 2.40 .... 3.49 .... 4.99 .... 8.01 .. 11.59 .. 14.00 .. 15.82 .. 15.83 .. 13.83 .... 8.79 .... 5.57 .... 3.61

18 ..... 2.50 .... 3.53 .... 4.90 .... 7.70 .. 11.82 .. 14.26 .. 15.94 .. 15.90 .. 13.67 .... 9.47 .... 5.29 .... 3.65

19 ..... 2.95 .... 3.61 .... 4.83 .... 8.21 .. 11.69 .. 14.16 .. 16.10 .. 15.66 .. 13.16 .... 9.52 .... 4.67 .... 3.80

20 ..... 3.02 .... 3.52 .... 4.99 .... 8.49 .. 11.67 .. 14.21 .. 16.37 .. 15.32 .. 13.14 .... 9.66 .... 4.69 .... 3.19

21 ..... 2.96 .... 4.45 .... 5.47 .... 8.61 .. 11.46 .. 13.99 .. 15.54 .. 15.36 .. 12.83 .... 9.30 .... 4.80 .... 3.15

22 ..... 2.53 .... 5.01 .... 5.71 .... 8.40 .. 11.63 .. 14.24 .. 15.59 .. 15.26 .. 12.92 .... 9.19 .... 4.62 .... 2.90

23 ..... 2.29 .... 5.17 .... 5.46 .... 8.47 .. 11.75 .. 14.61 .. 15.93 .. 15.44 .. 12.53 .... 8.51 .... 4.56 .... 2.68

24 ..... 2.60 .... 4.80 .... 5.96 .... 8.75 .. 11.69 .. 15.23 .. 16.24 .. 15.38 .. 12.21 .... 8.58 .... 4.69 .... 2.24

25 ..... 2.38 .... 4.83 .... 5.67 .... 8.80 .. 12.22 .. 15.10 .. 15.91 .. 15.53 .. 11.85 .... 8.27 .... 4.85 .... 2.43

26 ..... 2.94 .... 3.99 .... 6.07 .... 9.06 .. 12.60 .. 14.66 .. 16.02 .. 14.98 .. 11.86 .... 8.29 .... 5.50 .... 2.98

27 ..... 3.74 .... 4.04 .... 6.03 .... 8.81 .. 12.64 .. 15.12 .. 15.88 .. 14.92 .. 11.70 .... 7.94 .... 4.46 .... 1.97

28 ..... 3.26 .... 3.65 .... 6.51 .... 9.28 .. 12.84 .. 14.84 .. 15.92 .. 14.80 .. 11.06 .... 7.73 .... 4.80 .... 3.41

29 ..... 3.03 .... 2.19* ... 6.68 .... 9.02 .. 12.50 .. 15.33 .. 16.35 .. 15.21 .. 11.27 .... 7.25 .... 5.45 .... 3.01

30 ..... 2.94 .... xxxx .... 6.73 .... 9.39 .. 11.96 .. 15.02 .. 16.55 .. 15.30 .. 11.50 .... 7.67 .... 5.06 .... 3.01

31 ..... 3.38 .... xxxx .... 6.48 .... xxxx .. 12.54 .. xxxxx .. 16.55 .. 14.62 .. xxxxx .... 8.08 .... xxxx .... 2.45

Month . 2.56 .... 3.88 .... 5.09 .... 7.85 .. 11.29 .. 14.09 .. 15.70 .. 15.56 .. 13.26 .... 9.54 .... 5.69 .... 3.28

<<>> ...JAN .... FEB .... MAR .... APR ....MAY .... JUN .... JUL .... AUG.... SEP .... OCT .... NOV ....DEC

* Leap year day had only 7 cases, as 1800 was not a leap year (so 1796, 1804,08,12,16,20,24)

____________________________________________

Not all days in the Dalton period were colder than the long-term. For example, the period 21-25 Feb ran as much as two-thirds of a degree warmer. The first ten days of May also ran warmer by about half a degree at times. The end of July ran almost a half degree warmer (although the first third of July was a degree colder at times). 15 to 23 September saw another warmer spell in the half degree range.

The colder winters were most evident in Dec-Jan rather than Feb, and the onset of these colder winters was marked by considerably colder weather around 3-6 November (over a degree below the long-term averages there). Another marked cooling took place 17-25 November which ran almost a degree lower than long-term. All of December ran consistently colder by an average of just about a full degree, the 8th-10th and 24th-27th were particularly cold. This much colder trend lasted through the January averages and faded out in February.

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Posted (edited)

Record highest and lowest for each date, January / February

01 Jan ... 10.8 (1851) ... -5.9 (1820) ... range 16.7
02 Jan ... 10.4 (1948) ... -6.1 (1786) ... range 16.5
03 Jan ... 11.6 (1932) ... -7.7 (1795) ... range 19.3
04 Jan ... 10.5 (1948) ... -9.3 (1867) ... range 19.8
05 Jan ... 11.4 (1957) ... -6.5 (1789) ... range 17.9

06 Jan ... 10.3 (1898) ... -6.9 (1894) ... range 17.2
07 Jan ... 10.3 (1890) ... -7.7 (1841) ... range 18.0
08 Jan ..... 9.9 (1858.)... -9.2 (1841) ... range 19.1
09 Jan ... 10.7 (1998) ... -5.0 (1841) ... range 15.7
10 Jan ... 11.1 (1921) ... -6.7 (1814) ... range 17.8

11 Jan ... 10.1 (1990) ... -5.5 (1838) ... range 15.6
12 Jan ..... 9.9 (1976 ..... -7.7 (1987) ... range 17.6
.. .. .. .. .. .. .. .. &2007)
13 Jan ... 10.0 (1796 ..... -6.6 (1987) ... range 16.6
.. .. .. .. .. .. .. .. &1873)
14 Jan ... 10.2 (2011) ... -7.6 (1982) ... range 17.8
15 Jan ... 10.3 (1804) ... -8.5 (1820) ... range 18.8

16 Jan ... 10.8 (1990) ... -7.7 (1881) ... range 18.5
17 Jan ... 10.2 (1908) ... -6.2 (1881) ... range 16.4
18 Jan ... 10.0 (1828) ... -6.1 (1891) ... range 16.1
19 Jan ... 11.1 (1930) ... -8.9 (1823) ... range 20.0
20 Jan ... 11.2 (2008) .. -11.9 (1838) ... range 23.1

21 Jan ... 10.8 (1796 ..... -8.1 (1881) ... range 18.9
.. .. .. .. .. .. .. .. &1898)
22 Jan ... 10.3 (1878) ... -6.4 (1881) ... range 16.7
23 Jan ... 11.6 (1834) ... -8.4 (1963) ... range 20.0
24 Jan ... 10.6 (1782) ... -8.2 (1963) ... range 18.8
25 Jan ... 11.6 (2016) ... -8.9 (1795) ... range 20.5 ... breaks previous 11.4 1846

26 Jan ... 10.0 (1834) ... -7.6 (1945) ... range 17.6
27 Jan ... 10.5 (2016) ... -6.5 (1776) ... range 17.0 ... breaks previous 10.4 2003
28 Jan ..... 9.8 (1944) ... -6.3 (1776) ... range 16.1
29 Jan ... 10.4 (1854) ... -6.8 (1776) ... range 17.2
30 Jan ... 10.2 (2000) ... -7.5 (1776) ... range 17.7

31 Jan ... 10.9 (1868) ... -7.2 (1776) ... range 18.1

01 Feb ... 11.4 (1923) ... -6.8 (1956) ... range 18.2
02 Feb ... 11.0 (1923) ... -6.5 (1956) ... range 17.5
03 Feb ... 12.2 (2004) ... -5.4 (1841 & 1956) ... r 17.6
04 Feb ... 12.8 (2004) ... -5.0 (1912) ... range 17.8
05 Feb ... 11.8 (2004) ... -6.3 (1830) ... range 18.1

06 Feb ... 10.3 (1866) ... -7.3 (1895) ... range 17.6
07 Feb ... 10.5 (1869) ... -7.2 (1895) ... range 17.7
08 Feb ... 11.4 (1903) ... -8.3 (1895) ... range 19.7
09 Feb ... 11.4 (1831) ... -8.8 (1816) ... range 20.2
10 Feb ... 12.0 (1899) ... -6.2 (1895) ... range 18.2

11 Feb ... 11.4 (1939) ... -4.2 (1986) ... range 15.6
12 Feb ... 11.4 (1998) ... -7.7 (1845) ... range 19.1
13 Feb ... 12.0 (1998) ... -7.0 (1929) ... range 19.0
14 Feb ... 10.2 (1794) ... -7.1 (1929) ... range 17.3
15 Feb ... 11.2 (1958) ... -8.0 (1929) ... range 19.2

16 Feb ... 10.0 (1928) ... -7.3 (1855) ... range 17.3
17 Feb ... 10.7 (1878) ... -7.1 (1855) ... range 17.8
18 Feb ... 11.7 (1945) ... -3.9 (1855) ... range 15.6
19 Feb ... 10.6 (1893) ... -5.0 (1777) ... range 15.6
20 Feb ... 11.3 (1990) ... -6.6 (1785) ... range 17.9

21 Feb ... 11.2 (2019) ... -4.7 (1810) ... range 15.2 ___ breaks previous 10.6 (1813)
22 Feb ... 10.7 (1953) ... -3.3 (1855) ... range 14.0
23 Feb ... 11.7 (2012) ... -3.5 (1947) ... range 15.2
24 Feb ... 11.4 (1846) ... -6.7 (1947) ... range 18.1
25 Feb ... 11.0 (1922) ... -5.1 (1947) ... range 16.1

26 Feb ... 11.2 (1882) ... -4.7 (1783) ... range 15.9
27 Feb ... 11.5 (1828) ... -2.8 (1929) ... range 14.3
28 Feb ... 11.4 (1959) ... -3.8 (1785) ... range 15.3
29 Feb ... 12.0 (1960) ... -2.4 (1904) ... range 14.4

Edited by Roger J Smith
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Record highest and lowest for each date, March / April

01 Mar ... 10.7 (1878) ... -3.8 (2018.)... range 14.2 ... breaks previous -3.5 (1785)
02 Mar ... 11.1 (1777) ... -3.2 (1965) ... range 14.3
03 Mar ... 11.0 (1777) ... -3.9 (1965) ... range 14.9
04 Mar ... 12.3 (1859) ... -2.9 (1909) ... range 15.2
05 Mar ... 10.9 (1834) ... -2.8 (1786&1909) . r 13.7

06 Mar ... 12.0 (1989) ... -4.7 (1786) ... range 16.7
07 Mar ... 10.9 (1875) ... -3.3 (1947) ... range 14.2
08 Mar ... 12.2 (2000) ... -3.1 (1786) ... range 15.3
09 Mar ... 12.4 (1948) ... -3.0 (1917) ... range 15.4
10 Mar ... 11.6 (1957) ... -2.4 (1883) ... range 14.0

11 Mar ... 12.6 (1957) ... -1.9 (1847) ... range 14.5
12 Mar ... 13.4 (1957) ... -2.4 (1785) ... range 15.8
13 Mar ... 12.8 (1991) ... -6.5 (1845) ... range 19.3
14 Mar ... 11.5 (1805) ... -3.7 (1845) ... range 15.2
15 Mar ... 11.9 (1884) ... -1.6 (1867) ... range 13.5

16 Mar ... 13.2 (2004) ... -3.0 (1845) ... range 16.2
17 Mar ... 13.2 (2005) ... -2.2 (1845) ... range 15.4
18 Mar ... 14.1 (1990) ... -1.3 (1853) ... range 15.4
19 Mar ... 11.8 (1822) ... -0.9 (1814) ... range 12.7
20 Mar ... 12.3 (1779) ... -1.6 (1845) ... range 13.9

21 Mar ... 11.7 (1927 ..... -1.6 (1899) ... range 13.3
.. .. .. .. .. .. .. .. &1931)
22 Mar ... 12.6 (1903) ... -0.9 (1837) ... range 13.5
23 Mar ... 12.1 (1852 ..... -0.8 (1837&1899) . r 12.9
.. .. .. .. .. .. .. .. &1945)
24 Mar ... 13.4 (1776) ... -0.6 (1879) ... range 14.0
25 Mar ... 13.9 (1777) ... -1.3 (1853) ... range 15.2

26 Mar ... 14.6 (1777) ... -0.3 (1879&1901) . r 14.9
27 Mar ... 14.8 (1777)..... 0.1 (1901) ... range 14.7 _ 14.8 was highest in March to 2017
28 Mar ... 12.6 (1822 ..... -0.3 (1785) ... range 12.9
.. .. .. .. .. .. .. .. &1998)
29 Mar ... 13.4 (1813) ... -0.7 (1785) ... range 14.1
30 Mar ... 15.1 (2017)..... 0.0 (1799) ... range 15.1 _ breaks previous 13.4 (1920)

31 Mar ... 13.8 (1815) ... -0.8 (1799) ... range 14.6


01 Apr ... 13.3 (1995) ... -0.2 (1917) ... range 13.5
02 Apr ... 13.9 (1835) ... -0.5 (1917) ... range 14.4
03 Apr ... 15.0 (1926 ..... -0.5 (1799) ... range 15.5
.. .. .. .. .. .. .. .. &1946)
04 Apr ... 15.6 (1946)..... 1.0 (1809&1830) . r 14.6
05 Apr ... 13.3 (1857) ..... 0.4 (1911) ... range 12.9

06 Apr ... 15.1 (2011) ..... 0.8 (1911) ... range 14.3
07 Apr ... 14.7 (1859) ..... 1.0 (1839) ... range 13.7
08 Apr ... 12.5 (1798) ..... 2.4 (1780) ... range 10.1
09 Apr ... 13.7 (2017) ..... 1.4 (1812) ... range 12.1 _ breaks previous 13.5 (1778)
10 Apr ... 13.5 (1928) ..... 0.5 (1837) ... range 13.0

11 Apr ... 16.0 (1869) ..... 1.3 (1978) ... range 14.7
12 Apr ... 14.4 (1939) ..... 1.1 (1879) ... range 13.3
13 Apr ... 14.6 (1792) ..... 1.1 (1816) ... range 13.5
14 Apr ... 16.1 (1869) ..... 0.5 (1966) ... range 15.6
15 Apr ... 16.3 (1945) ..... 1.4 (1966) ... range 14.9

16 Apr ... 17.0 (1945) ..... 2.0 (1892) ... range 15.0
17 Apr ... 14.9 (1865) ..... 2.1 (1793&1812) . r 12.8
18 Apr ... 17.0 (2018.)..... 1.7 (1807) ... range 15.3 ... breaks previous 14.5 (1945)
19 Apr ... 17.6 (2018.) ... -0.2 (1772) ... range 17.8 ... breaks previous 15.4 (1870)
20 Apr ... 16.6 (1893) ..... 2.3 (1849) ... range 14.3

21 Apr ... 16.1 (1893) ..... 2.4 (1936) ... range 13.7
22 Apr ... 15.4 (2011) ..... 3.4 (1778) ... range 12.0
23 Apr ... 15.9 (1874) ..... 2.6 (1908) ... range 13.3
24 Apr ... 15.3 (2007) ..... 0.5 (1908) ... range 14.8
25 Apr ... 15.9 (1821) ..... 1.8 (1908) ... range 14.1

26 Apr ... 16.1 (1928) ..... 3.3 (1981) ... range 11.4
27 Apr ... 16.5 (1866) ..... 2.7 (1919) ... range 14.3
28 Apr ... 16.9 (1775) ..... 3.0 (1826) ... range 15.3
29 Apr ... 19.7 (1775) ..... 0.7 (1856) ... range 19.0
30 Apr ... 17.4 (1775) ..... 2.6 (1945) ... range 14.8


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Record highest and lowest for each date, May / June


01 May ... 16.1 (1990 ..... 4.2 (1866) ... range 11.9
.. .. .. .. .. .. .. .. &2005)
02 May ... 16.4 (1966) .... 3.8 (1979) ... range 12.6
03 May ... 17.7 (1990) .... 3.1 (1877) ... range 14.6
04 May ... 18.0 (1834) .... 3.2 (1877) ... range 14.8
05 May ... 16.7 (1800) .... 4.0 (1979) ... range 12.7

06 May ... 18.8 (1867) .... 4.4 (1831) ... range 14.4
07 May ... 16.9 (2018.) ... 4.1 (1879) ... range 12.8 ... breaks previous 16.8 (2008)
08 May ... 17.8 (2016) .... 2.9 (1861) ... range 14.9 ... breaks previous16.9 (1867)
09 May ... 17.6 (1945&2016) .. 5.7 (1837) .. range 11.9
10 May ... 18.2 (1959) .... 4.1 (1879) ... range 14.1

11 May ... 18.6 (2008) .... 4.1 (1773) ... range 14.5
12 May ... 18.8 (1945) .... 4.4 (1816) ... range 14.4
13 May ... 17.4 (1959) .... 5.0 (1915) ... range 12.4
14 May ... 18.8 (1992) .... 3.9 (1839) ... range 14.9
15 May ... 20.0 (1833) .... 4.3 (1839) ... range 15.7

16 May ... 20.0 (1808) .... 5.2 (1996) ... range 14.8
17 May ... 19.7 (1833) .... 3.6 (1935) ... range 16.1
18 May ... 19.1 (1952) .... 4.1 (1872) ... range 15.0
19 May ... 20.4 (1868) .... 5.2 (1872) ... range 15.2
20 May ... 17.8 (1916) .... 5.5 (1907) ... range 12.3

21 May ... 18.8 (1916) .... 5.7 (1894) ... range 13.1
22 May ... 19.5 (1918) .... 5.0 (1867) ... range 14.5
23 May ... 19.5 (1922) .... 4.9 (1867) ... range 14.6
24 May ... 18.8 (1953) .... 5.7 (1867) ... range 13.1
25 May ... 21.0 (1953) .... 6.5 (1814) ... range 14.5

26 May ... 18.7 (1784&2017) .. 4.6 (1821) .. range 14.1
27 May ... 19.0 (1788) .... 6.6 (1984) ... range 12.4
28 May ... 20.6 (1847) .... 6.2 (1869) ... range 14.4
29 May ... 21.2 (1780) .... 6.2 (1869) ... range 15.0
30 May ... 21.0 (1944) .... 4.9 (1807) ... range 16.1

31 May ... 20.5 (1947) .... 6.4 (1802) ... range 14.1


01 Jun ... 20.9 (1781) .... 7.7 (1802&1962) . r 13.2
02 Jun ... 22.3 (1947) .... 7.6 (1991) ... range 14.7
03 Jun ... 23.0 (1947) .... 7.9 (1773) ... range 15.1
04 Jun ... 20.3 (1982) .... 8.0 (1871&1991) . r 12.3
05 Jun ... 21.3 (1982) .... 8.2 (1991) ... range 13.1

06 Jun ... 22.5 (1950) .... 8.4 (1909) ... range 14.1
07 Jun ... 21.6 (1846) .... 8.6 (1814) ... range 13.0
08 Jun ... 20.4 (1940) .... 8.6 (1881&1914) . r 11.8
09 Jun ... 20.9 (1970) .... 7.3 (1816) ... range 13.6
10 Jun ... 21.5 (1970) .... 8.2 (1821) ... range 13.3

11 Jun ... 21.0 (1970) .... 8.0 (1777) ... range 13.0
12 Jun ... 20.8 (2006) .... 8.6 (1841) ... range 12.2
13 Jun ... 20.5 (1818 ..... 8.5 (1901) ... range 12.0
.. .. .. .. .. .. .. .. &1989)
14 Jun ... 19.4 (1814) .... 7.9 (1903) ... range 11.5
15 Jun ... 22.9 (1858) .... 8.1 (1850) ... range 14.8

16 Jun ... 20.7 (1858 ..... 9.6 (1869) ... range 11.1
.. .. .. .. .. .. .. .. &1896)
17 Jun ... 21.4 (1917) .... 9.1 (1928) ... range 12.3
18 Jun ... 21.2 (2005) .... 8.1 (1855) ... range 13.1
19 Jun ... 22.1 (2005) .... 7.3 (1795) ... range 14.8
20 Jun ... 21.7 (1846) .... 9.0 (1795&1964) . r 12.7

21 Jun ... 22.7 (1817) .... 9.8 (1903) ... range 12.9
22 Jun ... 22.3 (1941) .... 9.0 (1823) ... range 13.3
23 Jun ... 21.8 (1935) .... 9.4 (1823) ... range 12.4
24 Jun ... 22.0 (1935) .. 10.1 (1784) ... range 11.9
25 Jun ... 21.6 (1935) .... 8.7 (1835) ... range 12.9

26 Jun ... 22.3 (1976) .... 9.7 (1835) ... range 12.6
27 Jun ... 22.8 (1826) .. 10.2 (1862) ... range 12.6
28 Jun ... 22.6 (1976) .... 9.4 (1812) ... range 13.2
29 Jun ... 22.4(1976) .... 9.7 (1839) ... range 12.7
30 Jun ... 22.1 (1976) .... 9.1 (1839) ... range 13.0

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Record highest and lowest for each date, July / August

01 Jul ... 24.6 (2015) ... 10.4 (1773) ... range 14.2
02 Jul ... 22.8 (1976) ... 11.3 (1821) ... range 11.5
03 Jul ... 24.6 (1976) ... 10.1 (1907) ... range 14.5
04 Jul ... 24.7 (1976) ... 10.0 (1965) ... range 14.7
05 Jul ... 24.0 (1852) ... 10.7 (1920) ... range 13.3

06 Jul ... 23.3 (1976) ... 11.3 (1877) ... range 12.0
07 Jul ... 22.6 (1923 .... 11.1 (1877) ... range 11.5
.. .. .. .. .. .. .. .. &1976)
08 Jul ... 21.4 (1870 ..... 10.6 (1823) ... range 10.8
.. .. .. .. .. .. .. .. &1976)
09 Jul ... 21.6 (1921) ... 11.0 (1856) ... range 10.6
10 Jul ... 22.1 (1921) ... 11.2 (1993) ... range 10.9

11 Jul ... 22.6 (1783) ..... 9.4 (1888) ... range 12.8
12 Jul ... 23.7 (1923) ... 11.0 (1840) ... range 12.7
13 Jul ... 24.5 (1808) ... 10.2 (1840) ... range 14.3
14 Jul ... 24.4 (1808) ... 11.7 (1961) ... range 12.7
15 Jul ... 23.7 (1825) ... 11.5 (1883) ... range 12.2

16 Jul ... 22.7 (2003) ... 11.5 (1823) ... range 11.2
17 Jul ... 22.3 (1834) ... 11.0 (1892) ... range 11.3
18 Jul ... 23.3 (1825) ... 10.1 (1863) ... range 13.2
19 Jul ... 24.5 (2006) ... 10.6 (1892) ... range 13.9
20 Jul ... 23.5 (2016) ..... 8.7 (1836) ... range 14.8  ... breaks previous 22.9 (1878)

21 Jul ... 23.1 (1868) ... 11.3 (1902) ... range 11.8
22 Jul ... 23.2 (1868) ... 11.5 (1902) ... range 11.7
23 Jul ... 22.4 (1989) ... 10.1 (1843) ... range 12.3
24 Jul ... 23.9 (1818) ... 11.1 (1843) ... range 12.8
25 Jul ... 22.7 (2006) ... 10.9 (1920) ... range 11.8

26 Jul ... 23.2 (2006) ... 11.0 (1884) ... range 12.2
27 Jul ... 22.5 (2018.) ...10.6 (1867) ... range 11.9 ... breaks previous 21.9 (1948)
28 Jul ... 23.7 (1948) ... 11.8 (1886&1891) . range 11.9
29 Jul ... 25.2 (1948) ... 11.0 (1816) ... range 14.2
30 Jul ... 23.1 (1948) ... 10.6 (1786) ... range 12.5

31 Jul ... 23.4 (1943 ..... 10.9 (1841) ... range 12.5
.. .. .. .. .. .. .. .. &1995)


01 Aug ... 24.9 (1995) ... 11.9 (1888) ... range 13.0
02 Aug ... 24.6 (1995) ... 11.6 (1822) ... range 13.0
03 Aug ... 24.4 (1990) ... 10.5 (1912) ... range 13.9
04 Aug ... 23.4 (1975) ... 11.3 (1812) ... range 12.1
05 Aug ... 23.1 (2003) ... 11.3 (1812) ... range 11.8

06 Aug ... 22.5 (2003) ... 11.2 (1823&1860) . r 11.3
07 Aug ... 22.8 (1975) ... 11.6 (1898) ... range 11.2
08 Aug ... 23.7 (1975) ... 11.5 (1823) ... range 12.2
09 Aug ... 23.9 (2003) ... 11.0 (1931) ... range 12.9
10 Aug ... 22.5 (1773 ..... 10.8 (1892) ... range 11.7
.. .. .. .. .. .. .. .. &1997)

11 Aug ... 22.6 (1997) ... 10.8 (1902) ... range 11.8
12 Aug ... 22.2 (1911) ... 10.5 (1912) ... range 11.7
13 Aug ... 23.6 (1911) ... 10.5 (1881) ... range 13.1
14 Aug ... 21.3 (1911) ... 10.8 (1912) ... range 10.5
15 Aug ... 22.1 (1893) ... 10.3 (1829) ... range 11.8

16 Aug ... 21.6 (1947) ..... 9.5 (1888) ... range 12.1
17 Aug ... 22.4 (1876) ... 10.9 (1888) ... range 11.5
18 Aug ... 22.6 (1893) ... 10.3 (1830) ... range 12.3
19 Aug ... 22.8 (1932) ... 10.4 (1839) ... range 12.4
20 Aug ... 21.9 (1995) ... 10.5 (1920) ... range 11.4

21 Aug ... 21.6 (1984) ..... 9.8 (1850) ... range 11.8
22 Aug ... 22.1 (1955) ... 10.4 (1817) ... range 11.7
23 Aug ... 22.1 (1955) ... 10.3 (1877) ... range 11.8
24 Aug ... 21.5 (1990) ..... 9.1 (1864) ... range 12.4
25 Aug ... 20.9 (1899) .. 10.5 (1787,1843&64) .r 10.4

26 Aug ... 20.6 (1869) .... 8.8 (1864) ... range 11.8
27 Aug ... 22.8 (1930) ... 11.0 (1885&1890) . r 11.8
28 Aug ... 23.0 (1942) ... 10.5 (1919) ... range 12.5
29 Aug ... 22.6 (1930) ..... 9.1 (1812) ... range 11.5
30 Aug ... 19.8 (1804 ...... 9.5 (1890) ... range 10.3
.. .. .. .. .. .. .. .. &2008)

31 Aug ... 21.3 (1906) ..... 9.2 (1833) ... range 12.1

 

Edited by Roger J Smith
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Record highest and lowest for each date, September / October

01 Sep ... 21.8 (1780 ..... 7.1 (1816) ... range 14.7
.. .. .. .. .. .. .. .. &1906)
02 Sep ... 22.6 (1906) .... 7.6 (1816) ... range 15.0
03 Sep ... 20.2 (1880) .... 8.2 (1816&1908) . r 12.0
04 Sep ... 20.7 (1880) .... 7.7 (1841) ... range 13.0
05 Sep ... 22.4 (1949) .... 8.1 (1841) ... range 14.3

06 Sep ... 20.8 (1898) .... 8.5 (1841) ... range 12.3
07 Sep ... 21.1 (1868) .... 8.6 (1952) ... range 12.5
08 Sep ... 21.3 (1898) .... 8.9 (1807&1931) . r 12.4
09 Sep ... 19.8 (1898) .... 9.2 (1860&1912) . r 10.6
10 Sep ... 19.2 (1865) .... 8.6 (1860) ... range 10.6

11 Sep ... 20.3 (1999) .... 8.1 (1860) ... range 12.2
12 Sep ... 20.4 (1945) .... 8.1 (1848) ... range 12.3
13 Sep ... 20.7 (2016) .... 6.7 (1807) ... range 14.0 ... breaks previous 19.4 (2006)
14 Sep ... 21.3 (2016) .... 6.7 (1807) ... range 14.6 ... breaks previous 19.3 (1934)
15 Sep ..18.8 (1947,2016) .. 7.9 (1986) ... range 10.9

16 Sep ... 19.6 (1961) .... 8.1 (1807) ... range 11.5
17 Sep ... 20.4 (1898) .... 8.1 (1807) ... range 12.3
18 Sep ... 19.7 (1926) .... 6.9 (1807) ... range 12.8
19 Sep ... 20.9 (1926) .... 7.4 (1952) ... range 13.5
20 Sep ... 18.4 (1947) .... 6.8 (1919) ... range 11.6

21 Sep ... 21.4 (2006) .... 6.5 (1872) ... range 14.9
22 Sep ... 18.7 (1956) .... 6.3 (1872) ... range 12.6
23 Sep ... 18.3 (1956) .... 6.0 (1773) ... range 12.3
24 Sep ... 18.3 (2006) .... 6.7 (1872) ... range 11.6
25 Sep ... 19.4 (1895) .... 7.4 (1812) ... range 12.0

26 Sep ... 18.4 (1895) .... 6.0 (1885) ... range 12.4
27 Sep ... 19.0 (1895) .... 6.1 (1824&1885) . r 12.9
28 Sep ... 18.9 (2011) .... 4.9 (1824) ... range 14.0
29 Sep ... 19.7 (2011) .... 5.5 (1918) ... range 14.2
30 Sep ... 20.0 (2011) .... 6.3 (1808) ... range 13.7


01 Oct ... 20.2 (1985) .... 6.1 (1808&1888) . r 14.1
02 Oct ... 17.9 (2011) .... 3.6 (1817) ... range 14.3
03 Oct ... 19.8 (2011) .... 4.7 (1817) ... range 15.1
04 Oct ... 17.7 (1959) .... 5.1 (1912) ... range 12.6
05 Oct ... 17.9 (1886) .... 4.6 (1888) ... range 13.3

06 Oct ... 19.0 (1921) .... 4.1 (1888) ... range 14.9
07 Oct ... 16.9 (1921) .... 3.5 (1829) ... range 13.4
08 Oct ... 17.7 (1995) .... 4.1 (1829) ... range 13.6
09 Oct ... 17.5 (1995) .... 3.3 (1852) ... range 14.2
10 Oct ... 17.8 (1921) .... 3.5 (1814) ... range 14.3

11 Oct ... 17.6 (1978) .... 3.9 (1860) ... range 13.7
12 Oct ... 16.5 (1978) .... 3.2 (1887) ... range 13.3
13 Oct ... 18.5 (2018.).... 2.2 (1838) ... range 14.6 ... breaks previous 16.8 (1990)
14 Oct ... 17.2 (2017) .... 3.1 (1838) ... range 13.0 ... breaks previous 16.1 (1990)
15 Oct ... 15.7 (1930) .... 2.5 (1843) ... range 13.2

16 Oct ... 16.4 (2017) .... 1.8 (1843) ... range 14.0 ... breaks previous 15.8 (1818)
17 Oct ... 15.6 (1897) .... 2.5 (1824) ... range 13.1
18 Oct ... 16.7 (2014) .... 2.4 (1843) ... range 14.3 ... breaks previous 16.0 (1954)
19 Oct ... 16.3 (1921) .... 1.5 (1813) ... range 14.8
20 Oct ... 14.9 (1795) .... 2.1 (1842) ... range 12.8

21 Oct ... 15.2 (1977) .... 1.2 (1842) ... range 14.0
22 Oct ... 16.2 (1906) .... 2.5 (1931) ... range 13.7
23 Oct ... 14.4 (1998) .... 0.9 (1859) ... range 13.5
24 Oct ... 14.3 (2009) .... 0.6 (1859) ... range 13.7
25 Oct ..14.0 (1978&2013) . 2.0 (1784) . range 12.0

26 Oct ... 14.7 (1927) .... 1.5 (1785) ... range 13.2
27 Oct ... 16.7 (1888) .... 1.4 (1869) ... range 15.3 -- range was the extreme for Oct until 31st 2014
28 Oct ... 15.6 (1888) .... 0.9 (1895) ... range 14.7
29 Oct ... 14.0 (1772 ..... 0.3 (1895) ... range 13.7
.. .. .. .. .. .. .. .. &1984)
30 Oct ... 15.5 (2005) .... 0.7 (1836) ... range 14.8

31 Oct ... 16.9 (2014) .... 0.7 (1836) ... range 16.2 ... breaks previous 14.5 (1772)

Edited by Roger J Smith
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Record highest and lowest for each date, November / December

01 Nov ... 13.5 (1894 ..... 1.5 (1934) ... range 12.0
.. .. .. .. .. .. .. .. &1982)
02 Nov ... 14.3 (1821) ... 0.5 (1880) ... range 13.8
03 Nov ... 15.0 (1996) .... 1.9 (1820) ... range 13.1
04 Nov ... 14.2 (1946) .... 0.8 (1845&1848) . r 13.4
05 Nov ... 15.4 (1938) .... 0.8 (1801) ... range 14.6

06 Nov ... 14.3 (2015) .... 0.6 (1868) ... range 13.7 .... breaks previous 13.4 (1772)
07 Nov ... 13.8 (2015) ... -0.6 (1791) ... range 14.4 .... breaks previous 13.4 (1772)
08 Nov ... 13.4 (1852) ... -1.2 (1812) ... range 14.6
09 Nov ... 12.5 (1998.)... -0.5 (1921) ... range 13.0
10 Nov ... 13.4 (1977) .... 0.1 (1812) ... range 13.3 ..... max 13.3 (2015) not record

11 Nov ... 13.9 (2015) .... 0.3 (1828) ... range 12.7 .... breaks previous 13.0 (2005)
12 Nov ... 13.8 (1938 ... -1.4 (1919) ... range 15.2
.. .. .. .. .. .. .. .. &1947)
13 Nov ... 14.6 (1938) .. -1.1 (1862) ... range 15.7
14 Nov ... 13.4 (1938) .. -1.1 (1925) ... range 14.6
15 Nov ... 13.5 (1821) .. -2.1 (1965) ... range 15.6

16 Nov ... 13.4 (1997) .. -2.9 (1901) ... range 16.3
17 Nov ... 13.1 (1997) .. -2.0 (1841) ... range 15.1
18 Nov ... 12.2 (1978) .. -1.6 (1887) ... range 13.8
19 Nov ... 12.7 (1994) .. -2.1 (1815) ... range 14.8
20 Nov ... 12.8 (2009) .. -1.2 (1829) ... range 14.0

21 Nov ... 13.7 (1947) .. -1.4 (1880) ... range 15.1
22 Nov ... 14.4 (1947) .. -2.3 (1773) ... range 16.7
23 Nov ... 13.3 (1947) .. -4.2 (1858) ... range 17.5
24 Nov ... 12.7 (1980) .. -4.6 (1904) ... range 17.3
25 Nov ... 12.1 (1964) .. -1.5 (1923) ... range 13.6

26 Nov ... 12.1 (1983) .. -1.7 (1904) ... range 13.8
27 Nov ... 11.3 (1818) .. -2.6 (1915) ... range 13.9
28 Nov ... 12.0 (1828) .. -4.0 (2010) ... range 16.0
29 Nov ... 12.2 (1818) .. -2.6 (1801) ... range 14.8
30 Nov ... 12.4 (2001) .. -1.7 (1973) ... range 14.1


01 Dec ... 12.1 (1775) .. -3.0 (1947) ... range 15.1
02 Dec ... 12.2 (1985) .. -4.7 (1796) ... range 16.9
03 Dec ... 12.2 (1985) .. -4.0 (1879) ... range 16.2
04 Dec ... 12.1 (1888) .. -3.8 (1879&1925) . r 15.9
05 Dec ... 12.6 (1898) .. -3.7 (1844) ... range 16.3

06 Dec ... 12.3 (1898) .. -5.5 (1844) ... range 17.8
07 Dec ... 12.3 (1856) .. -5.7 (1879) ... range 18.0
08 Dec ... 12.1 (1856) .. -5.4 (1807) ... range 17.5
09 Dec ... 11.8 (1934) .. -4.0 (1803) ... range 15.8
10 Dec ... 10.9 (1997) .. -4.5 (1784) ... range 15.4

11 Dec ... 12.6 (1994) .. -6.7 (1784) ... range 19.3
12 Dec ... 12.9 (1994) .. -8.5 (1981) ... range 21.4 ... 1994 all-time max broken 2015
13 Dec ... 11.6 (1918) .. -6.5 (1981) ... range 18.1
14 Dec ... 11.8 (1912) .. -5.3 (1878) ... range 17.1
15 Dec ... 11.2 (1985) .. -5.4 (1788) ... range 16.6

16 Dec ... 11.4 (2015) .. -6.6 (1859) ... range 18.0 ... breaks previous 10.8 (1842)
17 Dec ... 12.5 (2015) .. -7.7 (1859) ... range 20.2 ... breaks previous 11.6 (1904)
18 Dec ... 12.5 (2015) .. -7.1 (1859) ... range 19.6 ... breaks previous 11.8 (2014)
19 Dec ... 13.1 (2015) .. -6.8 (2010) ... range 19.9 ... breaks previous 11.6 (1993)
20 Dec ... 11.1 (1828) .. -7.0 (2010) ... range 18.1

21 Dec ... 11.4 (1971) .. -5.9 (2010) ... range 17.3
22 Dec ... 11.6 (1991) .. -6.8 (1890) ... range 18.4
23 Dec ... 11.8 (1991) .. -6.4 (1870) ... range 18.2
24 Dec ... 10.7 (1843) .. -6.9 (1870) ... range 17.6
25 Dec ... 10.4 (1824 .. -10.8 (1796) ... range 21.2
.. .. . .. .. .. .. .. &1983)

26 Dec ... 11.0 (2011) .. -5.4 (1798) ... range 16.4
27 Dec ... 10.9 (2015) .. -8.4 (1798) ... range 19.3 ... breaks previous 10.6 (1987)
28 Dec ... 11.5 (1987) .. -8.2 (1798) ... range 19.7
29 Dec ... 12.0 (1987) .. -4.9 (1874) ... range 16.9
30 Dec ... 11.0 (1834) .. -6.1 (1870) ... range 17.1

31 Dec ... 11.1 (1859) .. -7.1 (1783) ... range 18.2

_______________________________________________

Edited by Roger J Smith
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Posted (edited)

Frequency of record highs and lows in each year

* in this table means two or three shared records (where two years tie), you can tell which by whether or not the asterisk follows a zero (then there are two) or a five (then there are three, the only example being 1976). Years with one shared record high or low will have totals that end in five and have no asterisk. ... there is one case with a three-way shared record low, and those three years have 0.3 as part of their total number of record lows. There are no years with four shared record highs or lows (if there are in the future then ** will denote this fact). As examples, 1796 has two shared record highs, and the total is shown as 1.0*. 1773 has one shared record high (0.5). 1807 has eight record lows plus a ninth shared one (8.5, no asterisk). 1976 shows 9.5* record highs which means 8 exclusive to that year and three more shared. This is the only case with three shared records (of the same extreme).

 

YEAR ___ Highs _ Lows ___ YEAR ___ Highs _ Lows ___ YEAR ___ Highs _ Lows ___ YEAR ___ Highs _ Lows

 

1772 ____ 0.5 ___ 1.0 _____ 1834 ____ 6.0 ___ 0.0 _____ 1896 ____ 0.5 ___ 0.0 _____ 1958 ____ 1.0 ___ 0.0

1773 ____ 0.5 ___ 5.0 _____ 1835 ____ 1.0 ___ 2.0 _____ 1897 ____ 1.0 ___ 0.0 _____ 1959 ____ 4.0 ___ 0.0

1774 ____ 0.0 ___ 0.0 _____ 1836 ____ 0.0 ___ 3.0 _____ 1898 ____ 7.5 ___ 1.0 _____ 1960 ____ 1.0 ___ 0.0

1775 ____ 4.0 ___ 0.0 _____ 1837 ____ 0.0 ___ 3.5 _____ 1899 ____ 2.0 ___ 1.5 _____ 1961 ____ 1.0 ___ 1.0

1776 ____ 1.0 ___ 5.0 _____ 1838 ____ 0.0 ___ 4.0 _____ 1900 ____ 0.0 ___ 0.0 _____ 1962 ____ 0.0 ___ 0.5

1777 ____ 5.0 ___ 2.0 _____ 1839 ____ 0.0 ___ 6.0 _____ 1901 ____ 0.0 ___ 2.5 _____ 1963 ____ 0.0 ___ 2.0

1778 ____ 0.0 ___ 1.0 _____ 1840 ____ 0.0 ___ 2.0 _____ 1902 ____ 0.0 ___ 3.0 _____ 1964 ____ 1.0 ___ 0.5

1779 ____ 1.0 ___ 0.0 _____ 1841 ____ 0.0 ___ 9.5 _____ 1903 ____ 2.0 ___ 2.0 _____ 1965 ____ 0.0 ___ 4.0

1780 ____ 1.5 ___ 1.0 _____ 1842 ____ 0.0 ___ 2.0 _____ 1904 ____ 0.0 ___ 3.0 _____ 1966 ____ 1.0 ___ 2.0

1781 ____ 1.0 ___ 0.0 _____ 1843 ____ 1.0 ___ 5.3 _____ 1905 ____ 0.0 ___ 0.0 _____ 1967 ____ 0.0 ___ 0.0

1782 ____ 1.0 ___ 0.0 _____ 1844 ____ 0.0 ___ 2.0 _____ 1906 ____ 3.5 ___ 0.0 _____ 1968 ____ 0.0 ___ 0.0

1783 ____ 1.0 ___ 2.0 _____ 1845 ____ 0.0 ___ 6.5 _____ 1907 ____ 0.0 ___ 2.0 _____ 1969 ____ 0.0 ___ 0.0

1784 ____ 0.5 ___ 4.0 _____ 1846 ____ 3.0 ___ 0.0 _____ 1908 ____ 1.0 ___ 3.5 _____ 1970 ____ 3.0 ___ 0.0

1785 ____ 0.0 ___ 6.0 _____ 1847 ____ 1.0 ___ 1.0 _____ 1909 ____ 0.0 ___ 2.5 _____ 1971 ____ 1.0 ___ 0.0

1786 ____ 0.0 ___ 4.5 _____ 1848 ____ 0.0 ___ 1.5 _____ 1910 ____ 0.0 ___ 0.0 _____ 1972 ____ 0.0 ___ 0.0

1787 ____ 0.0 ___ 0.3 _____ 1849 ____ 0.0 ___ 1.0 _____ 1911 ____ 3.0 ___ 2.0 _____ 1973 ____ 0.0 ___ 1.0

1788 ____ 1.0 ___ 1.0 _____ 1850 ____ 0.0 ___ 2.0 _____ 1912 ____ 1.0 ___ 5.5 _____ 1974 ____ 0.0 ___ 0.0

1789 ____ 0.0 ___ 1.0 _____ 1851 ____ 1.0 ___ 0.0 _____ 1913 ____ 0.0 ___ 0.0 _____ 1975 ____ 3.0 ___ 0.0

1790 ____ 0.0 ___ 0.0 _____ 1852 ____ 2.5 ___ 1.0 _____ 1914 ____ 0.0 ___ 0.5 _____ 1976 ____ 9.5*___ 0.0

1791 ____ 0.0 ___ 1.0 _____ 1853 ____ 1.0 ___ 2.0 _____ 1915 ____ 0.0 ___ 2.0 _____ 1977 ____ 2.0 ___ 0.0

1792 ____ 1.0 ___ 0.0 _____ 1854 ____ 1.0 ___ 0.0 _____ 1916 ____ 2.0 ___ 0.0 _____ 1978 ____ 3.5 ___ 1.0

1793 ____ 0.0 ___ 0.5 _____ 1855 ____ 0.0 ___ 5.0 _____ 1917 ____ 1.0 ___ 3.0 _____ 1979 ____ 0.0 ___ 2.0

1794 ____ 1.0 ___ 0.0 _____ 1856 ____ 2.0 ___ 2.0 _____ 1918 ____ 2.0 ___ 1.0 _____ 1980 ____ 1.0 ___ 0.0

1795 ____ 1.0 ___ 3.5 _____ 1857 ____ 1.0 ___ 0.0 _____ 1919 ____ 0.0 ___ 4.0 _____ 1981 ____ 0.0 ___ 3.0

1796 ____ 1.0*___2.0 _____ 1858 ____ 2.5 ___ 1.0 _____ 1920 ____ 0.0 ___ 3.0 _____ 1982 ____ 2.5 ___ 1.0

1797 ____ 0.0 ___ 0.0 _____ 1859 ____ 3.0 ___ 5.0 _____ 1921 ____ 7.0 ___ 1.0 _____ 1983 ____ 1.5 ___ 0.0

1798 ____ 1.0 ___ 3.0 _____ 1860 ____ 0.0 ___ 4.0* _____1922 ____ 2.0 ___ 0.0 _____ 1984 ____ 1.5 ___ 1.0

1799 ____ 0.0 ___ 3.0 _____ 1861 ____ 0.0 ___ 1.0 _____ 1923 ____ 3.5 ___ 1.0 _____ 1985 ____ 4.0 ___ 0.0

1800 ____ 1.0 ___ 0.0 _____ 1862 ____ 0.0 ___ 2.0 _____ 1924 ____ 0.0 ___ 0.0 _____ 1986 ____ 0.0 ___ 2.0

1801 ____ 0.0 ___ 2.0 _____ 1863 ____ 0.0 ___ 1.0 _____ 1925 ____ 0.0 ___ 1.5 _____ 1987 ____ 2.0 ___ 2.0

1802 ____ 0.0 ___ 1.5 _____ 1864 ____ 0.0 ___ 2.3 _____ 1926 ____ 2.5 ___ 0.0 _____ 1988 ____ 0.0 ___ 0.0

1803 ____ 0.0 ___ 1.0 _____ 1865 ____ 2.0 ___ 0.0 _____ 1927 ____ 1.5 ___ 0.0 _____ 1989 ____ 2.5 ___ 0.0

1804 ____ 1.5 ___ 0.0 _____ 1866 ____ 2.0 ___ 1.0 _____ 1928 ____ 3.0 ___ 1.0 _____ 1990 ____ 6.5 ___ 0.0

1805 ____ 1.0 ___ 0.0 _____ 1867 ____ 1.0 ___ 6.0 _____ 1929 ____ 0.0 ___ 4.0 _____ 1991 ____ 3.0 ___ 2.5

1806 ____ 0.0 ___ 0.0 _____ 1868 ____ 5.0 ___ 1.0 _____ 1930 ____ 4.0 ___ 0.0 _____ 1992 ____ 1.0 ___ 0.0

1807 ____ 0.0 ___ 8.5 _____ 1869 ____ 4.0 ___ 4.0 _____ 1931 ____ 0.5 ___ 2.5 _____ 1993 ____ 0.0 ___ 1.0

1808 ____ 3.0 ___ 1.5 _____ 1870 ____ 0.5 ___ 3.0 _____ 1932 ____ 2.0 ___ 0.0 _____ 1994 ____ 3.0 ___ 0.0

1809 ____ 0.0 ___ 0.5 _____ 1871 ____ 0.0 ___ 0.5 _____ 1933 ____ 0.0 ___ 0.0 _____ 1995 ____ 6.5 ___ 0.0

1810 ____ 0.0 ___ 1.0 _____ 1872 ____ 0.0 ___ 5.0 _____ 1934 ____ 2.0 ___ 1.0 _____ 1996 ____ 1.0 ___ 1.0

1811 ____ 0.0 ___ 0.0 _____ 1873 ____ 0.5 ___ 0.0 _____ 1935 ____ 3.0 ___ 1.0 _____ 1997 ____ 4.5 ___ 0.0

1812 ____ 0.0 ___ 8.5 _____ 1874 ____ 1.0 ___ 1.0 _____ 1936 ____ 0.0 ___ 1.0 _____ 1998 ____ 6.5 ___ 0.0

1813 ____ 1.0 ___ 1.0 _____ 1875 ____ 1.0 ___ 0.0 _____ 1937 ____ 0.0 ___ 0.0 _____ 1999 ____ 1.0 ___ 0.0

1814 ____ 1.0 ___ 5.0 _____ 1876 ____ 1.0 ___ 0.0 _____ 1938 ____ 2.5 ___ 0.0 _____ 2000 ____ 2.0 ___ 0.0

1815 ____ 1.0 ___ 1.0 _____ 1877 ____ 0.0 ___ 5.0 _____ 1939 ____ 2.0 ___ 0.0 _____ 2001 ____ 1.0 ___ 0.0

1816 ____ 0.0 ___ 7.5 _____ 1878 ____ 3.0 ___ 1.0 _____ 1940 ____ 1.0 ___ 0.0 _____ 2002 ____ 0.0 ___ 0.0

1817 ____ 1.0 ___ 3.0 _____ 1879 ____ 0.0 ___ 7.0*_____1941 ____ 1.0 ___ 0.0 _____ 2003 ____ 4.0 ___ 0.0

1818 ____ 4.5 ___ 0.0 _____ 1880 ____ 2.0 ___ 2.0 _____ 1942 ____ 1.0 ___ 0.0 _____ 2004 ____ 4.0 ___ 0.0

1819 ____ 0.0 ___ 0.0 _____ 1881 ____ 0.0 ___ 5.5 _____ 1943 ____ 0.5 ___ 0.0 _____ 2005 ____ 4.5 ___ 0.0

1820 ____ 0.0 ___ 3.0 _____ 1882 ____ 1.0 ___ 0.0 _____ 1944 ____ 2.0 ___ 0.0 _____ 2006 ____ 7.0 ___ 0.0

1821 ____ 3.0 ___ 3.0 _____ 1883 ____ 0.0 ___ 2.0 _____ 1945 ____ 7.0*___ 1.0 _____2007 ____ 1.5 ___ 0.0

1822 ____ 1.5 ___ 1.0 _____ 1884 ____ 1.0 ___ 1.0 _____ 1946 ____ 2.5 ___ 0.0 _____ 2008 ____ 2.5 ___ 0.0

1823 ____ 0.0 ___ 6.5 _____ 1885 ____ 0.0 ___ 2.0*_____ 1947 ____ 9.5 ___ 5.0 _____ 2009 ____ 2.0 ___ 0.0

1824 ____ 0.5 ___ 2.5 _____ 1886 ____ 1.0 ___ 0.5 _____ 1948 ____ 6.0 ___ 0.0 _____ 2010 ____ 0.0 ___ 4.0

1825 ____ 2.0 ___ 0.0 _____ 1887 ____ 0.0 ___ 2.0 _____ 1949 ____ 1.0 ___ 0.0 _____ 2011 ____ 9.0 ___ 0.0

1826 ____ 1.0 ___ 1.0 _____ 1888 ____ 3.0 ___ 6.5 _____ 1950 ____ 1.0 ___ 0.0 _____ 2012 ____ 1.0 ___ 0.0

1827 ____ 0.0 ___ 0.0 _____ 1889 ____ 0.0 ___ 0.0 _____ 1951 ____ 0.0 ___ 0.0 _____ 2013 ____ 0.5 ___ 0.0

1828 ____ 4.0 ___ 1.0 _____ 1890 ____ 1.0 ___ 2.5 _____ 1952 ____ 1.0 ___ 2.0 _____ 2014 ____ 2.0 ___ 0.0

1829 ____ 0.0 ___ 4.0 _____ 1891 ____ 0.0 ___ 1.5 _____ 1953 ____ 3.0 ___ 0.0 _____ 2015 ____ 9.0 ___ 0.0

1830 ____ 0.0 ___ 2.5 _____ 1892 ____ 0.0 ___ 4.0 _____ 1954 ____ 0.0 ___ 0.0 _____ 2016 ____ 6.5 ___ 0.0

1831 ____ 1.0 ___ 1.0 _____ 1893 ____ 5.0 ___ 0.0 _____ 1955 ____ 2.0 ___ 0.0 _____ 2017 ____ 4.5 ___ 0.0

1832 ____ 0.0 ___ 0.0 _____ 1894 ____ 0.5 ___ 2.0 _____ 1956 ____ 2.0 ___ 2.5 _____ 2018 ____ 5.0 ___ 1.0

1833 ____ 2.0 ___ 1.0 _____ 1895 ____ 3.0 ___ 6.0 _____ 1957 ____ 4.0 ___ 0.0 _____ 2019 ____ 1.0 ___ ?.?

________________________________________________________________________

The random chance of records falling in any given year would amount to about 1.5 of each type, so that years with one or two records of each kind are closest to normal distributions. 

The number of record highs since about 1976 is anomalously high. There have been exclusive records on 117 days plus shared records on 17 more. At random you would expect about 60 in this interval. The number of record lows since 1988 is very low, only nine new records and one shared record in that 30-year interval. 

(table edited for 21 Feb 2019 record high) _ 1813 lost one record high.

 

 

Edited by Roger J Smith
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Warmest and Coldest Day of each Year 1772-1830 (and coldest of each winter)

 

YEAR ... MAX DAILY MEAN (date) ... MIN DAILY MEAN (date) ... Coldest of winter (incl Jan-Mar of year, Nov-Dec previous year)

1772 ... 20.8 ... 26 June .................. -4.5 ... 06 Feb ...............-4.5 on 6 Feb .. no data Nov-Dec 1771

1773 ... 22.5 ... 10 Aug ................... -3.3 ... 09 Feb ...............-4.0 on 25 Dec 1772

1774 ... 20.2 ... 09 Aug ................... -3.2 ... 09 Dec .............. -3.0 on 4-5 Jan 1774

1775 ... 21.1 ... 21 July ................... -3.7 ... 25 Jan ............... -3.7 on 25 Jan 1775

1776 ... 20.3 ... 02 Aug ................... -7.5 ... 30 Jan ............... -7.5 on 30 Jan 1776

1777 ... 19.4 ... 16 & 17 July............ -5.0 ... 08 Jan,19 Feb ... -5.0 on 8 Jan & 19 Feb 1777

1778 ... 21.6 ... 13 July ................... -2.9 ... 27 Jan ................ -2.9 on 27 Jan 1778

1779 ... 22.0 ... 15 July ................... -5.1 ... 25 Dec ............... -1.4 on 15 Jan 1779

1780 ... 21.8 ... 01 Sep ................... -6.1 ... 13 Jan ............... -6.1 on 13 Jan 1780

1781 ... 20.9 ... 01 June .................. -2.9 ... 23 Jan ............... -2.9 on 23 Jan 1781

1782 ... 20.1 ... 26 June .................. -2.2 ... 16 Feb .............. -2.2 on 16 Feb 1782

1783 ... 22.6 ... 11 July .................... -7.1 ... 31 Dec .............. -4.7 on 26 Feb 1783

1784 ... 20.3 ... 07 July .................... -6.7 ..12 Feb, 11 Dec.... -7.1 on 31 Dec 1783

1785 ... 19.5 ... 27 June, 26 July ..... -6.6 ... 20 Feb ............... -6.7 on 11 Dec 1784

1786 ... 20.7 ... 05 June ...................-7.6 ... 03 Jan ................ -7.6 on 3 Jan 1786

1787 ... 19.9 ... 05 July .................... -2.2 ... 28 Nov ............... -0.5 on 15 Nov 1786 & 27 Jan 1787**

1788 ... 20.4 ... 12 July .................... -5.9 ... 30 Dec .............. -2.5 on 8 March 1788

1789 ... 19.2 ... 05 Aug .................... -6.7 ... 12 Jan ............... -6.7 on 12 Jan 1789

1790 ... 21.8 ... 22 June .................. -0.6 ... 29 Dec ............... +0.6 on 20 Jan 1790

1791 ... 20.0 ... 05 June .................. -3.7 ... 12 Dec ................ -0.6 on 29 Dec 1790

1792 ... 21.8 ... 12 Aug ................... -5.4 ... 12 Jan ................. -5.4 on 12 Jan 1792

1793 ... 22.2 ... 16 July .................... -0.7 ... 30 Dec ............... -1.5 on 31 Dec 1792

1794 ... 20.6 ... 07 July .................... -2.8 ... 10 Jan ................ -2.8 on 10 Jan 1794

1795 ... 20.7 ... 12 Aug .................... -8.9 ... 25 Jan ................ -8.9 on 25 Jan 1795

1796 ... 19.6 ... 22 Aug .................. -10.8 ... 25 Dec .............. -1.4 on 6 & 7 March 1796

1797 ... 21.2 ... 14 July .................... -2.6 ... 09 Jan .............. -10.8 on 25 Dec 1796

1798 ... 21.4 ... 29 June .................. -8.4 ... 27 Dec ............... -1.6 on 19 Feb 1798

1799 ... 18.7 ... 10 June .................. -6.0 ... 31 Dec ................-8.4 on 27 Dec 1798

1800 ... 21.7 ... 02 Aug ................... -5.0 ... 01 Jan ................ -6.0 on 31 Dec 1799

1801 ... 20.2 ... 22 July ................... -3.8 ... 19 Dec ................ -1.3 on 13 Feb 1801

1802 ... 19.8 ... 06 Aug ................... -4.1 ... 13 Jan ................. -4.1 on 13 Jan 1802

1803 ... 20.8 ... 02 & 31 July ........... -5.9 ... 26 Jan ................. -5.9 on 26 Jan 1803

1804 ... 21.0 ... 01 Aug ................... -4.1 ... 24 Dec ................ -4.0 on 9 Dec 1803

1805 ... 18.9 ... 04 July ................... -3.8 ... 13 Dec ................ -4.1 on 24 Dec 1804

1806 ... 19.5 ... 10 June .................. -1.2 ... 30 Jan ................ -3.8 on 13 Dec 1805

1807 ... 21.2 ... 22 July .................... -5.4 ... 08 Dec ............... -2.5 on 18 & 19 Feb 1807

1808 ... 24.5 ... 13 July .................... -5.7 ... 22 Jan ................ -5.7 on 22 Jan 1808

1809 ... 18.5 ... 11 Aug*................... -5.1 ... 18 Jan ................ -5.1 on 18 Jan 1809

1810 ... 20.5 ... 02 Sep ................... -4.7 ... 21 Feb ................ -4.7 on 21 Feb 1810

1811 ... 18.6 ... 29 July ................... -3.6 ... 03 Jan ................. -3.6 on 3 Jan 1811

1812 ... 19.0 ... 18 July ................... -4.4 ... 08 Dec ................ -2.7 on 31 Dec 1811

1813 ... 20.2 ... 30 July ................... -3.2 ... 30 Dec ................ -4.4 on 8 Dec 1812

1814 ... 22.0 ....28 July ................... -6.7 ... 10 Jan ................. -6.7 on 10 Jan 1814

1815 ... 18.4 ... 12 July & 25 Aug..... -5.3 ... 24 Jan ................. -5.3 on 24 Jan 1815

1816 ....18.5 ... 20 July ................... -8.8 ... 09 Feb ................. -8.8 on 9 Feb 1816

1817 ... 22.7 ... 21 June ................. -2.0 ... 10 Jan .................. -4.9 on 22 Dec 1816

1818 ... 23.9 ... 24 July ................... -3.0 ... 17 Dec ................. -2.0 on 1 Jan 1818

1819 ... 21.8 ... 31 July ................... -6.0 ... 11 Dec ................. -3.0 on 17 Dec 1818

1820 ....21.9 ... 28 June .................. -8.5 ... 15 Jan ................. -8.5 on 15 Jan 1820

1821 ... 19.8 ... 05 Aug ................... -3.3 ... 02 Jan ................. -3.3 on 2 Jan 1821

1822 ....21.1 ... 10 Jun .................... -3.8 ... 28 Dec ................ +0.7 on 16 Jan 1822

1823 ... 19.2 ... 20 July & 14 Sep .... -8.9 ... 19 Jan ................. -8.9 on 19 Jan 1823

1824 ... 21.1 ... 02 Sep .................. -0.9 ... 14 Jan ................. -0.9 on 14 Jan 1824

1825 ... 23.7 ... 15 July .................. -1.2 ... 27 Dec ................. -0.7 on 4 Feb 1825

1826 ... 22.8 ... 27 June .................. -6.9 ... 15 Jan ................. -6.9 on 15 Jan 1826

1827 ... 20.7 ... 29 July ................... -4.7 ... 03 Jan ................. -4.7 on 03 Jan 1827

1828 ... 20.9 ... 03 July .................. -1.0 ... 09 Jan ................ -1.0 on 22 Nov 1827 & 9 Jan 1828

1829 ... 19.0 ... 03 June .................. -4.8.... 23 Jan ................ -4.8 on 23 Jan 1829

1830 ... 22.5 ... 30 July .................... -6.7 ... 24 Dec ................ -6.4 on 6 Feb 1830

_______________________________________________________

* worth noting that 18.4 on 19 May was just 0.1 below the annual max.

** the winter of 1786-87 has incomplete daily data; December dates are all listed as 2.8 which is the monthly mean but it's unlikely that this was the case, probably some day reached a value below the -0.5 C recorded in Nov 1786 and Jan 1787, a good estimate from the mean would be -3.5 C.

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Annual Daily Max and Min, Winter's coldest day ... 1831 to 1900

.... .... continued from previous post (1772-1830) .... ....

 

YEAR ..... MAX daily mean CET .... MIN daily mean CET .... Winter seasonal minimum (incl Jan-Feb of year)

1831 ... 20.2 ... 09 July .................... -3.0 ... 30 Jan ................. -6.7 on 24 Dec 1830

1832 ... 19.9 ... 10 Aug .................... -1.9 ... 01 Jan ................ -1.9 on 01 Jan 1832

1833 ... 20.0 ... 15 May & 28 July ..... -2.6 ... 23 Jan ............... -2.6 on 23 Jan 1833

1834 ... 22.3 ... 17 July .................... +0.4 ... 08 Feb ............... +0.4 on 8 Feb 1834

1835 ... 20.7 ... 10 & 11 Aug ............ -5.2 ... 07 Jan ................ -5.2 on 7 Jan 1835

1836 ... 22.1 ... 05 July .................... -3.5 ... 02 Jan ................ -3.5 on 2 Jan 1836

1837 ... 21.2 ... 27 July .................... -3.3 ... 01 Jan ................ -3.3 on 1 Jan 1837

1838 ... 20.3 ... 13 July .................. -11.9 ... 20 Jan ............. -11.9 on 20 Jan 1838

1839 ... 18.9 ... 03 Aug .................... -3.0 ... 30 Jan .................-3.0 on 30 Jan 1839

1840 ... 19.6 ... 06 Aug ................... -4.4 ... 25 Dec ................ -4.1 on 07 Jan 1840

1841 ... 18.8 ... 27 Aug .................... -9.2 ... 08 Jan ................ -9.2 on 8 Jan 1841

1842 ... 21.9 ... 10 Aug .................... -1.8 ... 09 Jan ................ -2.7 on 18 Dec 1841

1843 ... 20.4 ... 05 July .................... -3.5 ... 15 Feb ............... -3.5 on 15 Feb 1843

1844 ... 21.6 ... 23 June ................... -5.5 ... 06 Dec ............... -3.1 on 13 Feb 1844

1845 ... 19.6 ... 15 June ................... -7.7 ... 12 Feb ............... -7.7 on 12 Feb 1845

1846 ... 22.0 ... 22 June ................... -4.2 ... 14 & 15 Dec ....... -0.3 on 13 Dec 1845, 5 Jan 1846

1847 ... 22.5 ... 14 July .................... -5.0 ... 09 Feb ................ -5.0 on 9 Feb 1847

1848 ... 20.5 ... 06 July .................... -4.4 ... 28 Jan ................. -4.4 on 28 Jan 1848

1849 ... 19.0 ... 07 Aug .................... -3.8 ... 02 Jan & 28 Dec...-3.8 on 2 Jan 1849

1850 ... 21.3 ... 15 July .................... -2.8 ... 07 Jan ................. -3.8 on 28 Dec 1849

1851 ... 20.3 ... 27 June .................. -0.4 ... 30 Nov ................ -0.2 on 24 Jan 1851

1852 ... 24.0 ... 05 July .................... -0.5 ... 20 Feb ............... -0.5 on 20 Feb 1852

1853 ... 18.8 ... 07 July .................... -5.0 ... 28 Dec ............... -3.2 on 13 Feb 1853

1854 ... 21.2 ... 24 July .................... -4.6 ... 02 Jan ................ -5.0 on 28 Dec 1853

1855 ... 20.3 ... 23 July .................... -7.3 ... 16 Feb ............... -7.3 on 16 Feb 1855

1856 ... 22.2 ... 02 Aug .................... -3.0 ... 28 Dec ............... -4.7 on 21 Dec 1855

1857 ... 21.1 ... 28 June & 23 Aug ....-3.0 ... 29 Jan ................ -3.0 on 28 Dec 1856 & 29 Jan 1857

1858 ... 22.9 ... 15 June .................. -4.2 ... 23 Nov ................ -2.0 on 10 Mar 1858

1859 ... 22.2 ... 18 July .................... -7.7 ... 17 Dec ................-4.2 on 23 Nov 1858

1860 ... 17.2 ... 05 July .................... -3.9 ... 13 Feb ............... -7.7 on 17 Dec 1859

1861 ... 19.6 ... 12 Aug .................... -3.4 ... 29 Dec ............... -3.7 on 20 & 27 Dec 1860

1862 ... 17.3 ... 01 Aug .................... -2.6 ... 18 Jan ................ -3.4 on 29 Dec 1861

1863 ... 19.5 ... 07 Aug .................... +0.9 ... 11 Jan .............. -1.1 on 13 Nov 1862

1864 ... 19.7 ... 30 Aug .................... -6.2 ... 06 Jan ................ -6.2 on 6 Jan 1864

1865 ... 19.9 ... 04 & 24 July ............ -6.1 ... 28 Jan ................ -6.1 on 28 Jan 1865

1866 ... 20.6 ... 12 July .................... -3.2 ... 28 Feb ............... -3.2 on 28 Feb 1866

1867 ... 20.4 ... 13 Aug .................... -9.3 ... 04 Jan ................ -9.3 on 4 Jan 1867

1868 ... 23.2 ... 22 July .................... -1.4 ... 01 & 02 Jan ........ -1.4 on 1 & 2 Jan 1868

1869 ... 21.9 ... 17 July .................... -2.7 ... 28 Dec .................-0.7 on 24 Jan 1869

1870 ... 21.4 ... 08 July .................... -6.9 ... 24 Dec ................ -3.2 on 26 Jan & 11 Feb 1870

1871 ... 21.6 ... 13 Aug .................... -3.6 ... 01 Jan ................ -6.9 on 24 Dec 1870

1872 ... 22.0 ... 25 July ................... +0.7 ... 21 Mar & 11 Dec . -2.3 on 8 Dec 1871

1873 ... 22.3 ... 22 July .................... -2.9 ... 10 & 11 Dec ....... -1.5 on 1 Feb 1873

1874 ... 21.4 ... 09 July .................... -5.5 ... 22 Dec ................ -2.9 on 10 & 11 Dec 1873

1875 ... 19.2 ... 08 Aug .................... -1.7 ... 05 Dec ................ -5.5 on 22 Dec 1874

1876 ... 22.4 ... 17 Aug .................... -3.3 ... 11 Feb ............... -3.3 on 11 Feb 1876

1877 ... 19.6 ... 20 Aug .................... -1.0 ... 28 Feb ................ -1.0 on 28 Feb 1877

1878 ... 22.9 ... 20 July .................... -5.8 ... 25 Dec ................ +0.4 on 27 Dec 1877

1879 ... 18.4 ... 12 Aug .................... -5.7 ... 07 Dec .................-5.8 on 25 Dec 1878

1880 ... 20.7 ... 04 Sep .................... -4.3 ... 20 Jan ................. -5.7 on 07 Dec 1879

1881 ... 21.9 ... 05 July .................... -8.1 ... 21 Jan ................ -8.1 on 21 Jan 1881

1882 ... 18.6 ... 13 Aug .................... -3.7 ... 11 Dec ............... -1.0 on 10 Dec 1881

1883 ... 19.0 ... 30 June .................. -2.4 ... 10 Mar ............... -3.7 on 11 Dec 1882

1884 ... 22.5 ... 11 Aug .................... -1.1 ... 23 Dec ................ -0.1 on 7 Dec 1883

1885 ... 21.1 ... 26 July .................... -2.1 ... 08 Dec ................ -1.1 on 23 Dec 1884

1886 ... 20.7 ... 04 July .................... -3.3 ... 20 Dec ............... -2.7 on 7 Jan 1886

1887 ... 20.6 ... 06 Aug .................... -3.9 ... 01 Jan ................ -3.9 on 01 Jan 1887

1888 ... 19.6 ... 10 Aug .................... -1.8 ... 25 Feb ............... -2.3 on 27 Dec 1887

1889 ... 19.2 ... 12 Sep .................... -2.7 ... 10 Feb ................-2.7 on 10 Feb 1889

1890 ... 18.2 ... 05 Aug .................... -6.8 ... 22 Dec ................ -2.0 on 3 Mar 1890

1891 ... 18.8 ... 25 June ................... -6.1 ... 18 Jan ................ -6.8 on 22 Dec 1890

1892 ... 19.4 ... 03 July .................... -5.0 ... 28 Dec ............... -4.9 on 24 Dec 1891

1893 ... 22.6 ... 18 Aug .................... -5.0 ... 05 Jan ................ -5.0 on 28 Dec 1892 & 5 Jan 1893

1894 ... 20.1 ... 01 July .................... -6.9 ... 06 Jan ................ -6.9 on 6 Jan 1894

1895 ... 20.0 ... 26 June ................... -8.3 ... 08 Feb ............... -8.3 on 8 Feb 1895

1896 ... 20.7 ... 16 June ................... -0.9 ... 21 Jan & 30 Nov.. -0.9 on 21 Jan 1896

1897 ... 22.2 ... 05 Aug .................... -2.8 ... 23 Dec ................ -2.2 on 23 Jan 1897

1898 ... 21.3 ... 08 Sep ................... +0.2 ... 21 Feb ................ -2.8 on 23 Dec 1897

1899 ... 21.1 ... 20 July .................... -4.8 ... 14 Dec ............... -1.6 on 21 Mar 1899

1900 ... 22.0 ... 20 July .................... -3.4 ... 08 Feb ............... -4.8 on 14 Dec 1899

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Annual extremes for 1901-60 with coldest day of winter season

.... .... continued from above tables .... ....

 

YEAR ... MAX daily mean (date) .... MIN daily mean (date) .... WINTER MIN (date)

_________________________________________________________________________

1901 ... 22.6 ... 19 July .................... -3.5 ... 22 Dec ............... -2.6 on 14 Feb 1901

1902 ... 20.0 ... 28 June .................. -3.6 ... 13 Feb ............... -3.6 on 13 Feb 1902

1903 ... 20.2 ... 09 July .................... -3.3 ... 14 Jan ............... -3.3 on 14 Jan 1903

1904 ... 21.4 ... 04 Aug .................... -4.6 ... 24 Nov ............... -2.6 on 29 Dec 1903

1905 ... 19.5 ... 09,13,14 July .......... -1.8 ... 16 Jan ................ -4.6 on 24 Nov 1904

1906 ... 22.6 ... 02 Seo .................... -2.5 ... 26 Dec ............... -0.7 on 18 Nov 1905

1907 ... 18.0 ... 16 July .................... -3.4 ... 24 Jan ................ -3.4 on 24 Jan 1907

1908 ... 19.6 ... 30 Sep .................... -5.2 ... 30 Dec ............... -2.4 on 05 Jan 1908

1909 ... 20.3 ... 15 Aug .................... -2.9 ... 04 Mar ................-5.2 on 30 Dec 1908

1910 ... 18.7 ... 20 & 21 June .......... -3.6 ... 27 Jan ................ -3.6 on 27 Jan 1910

1911 ... 23.6 ... 13 Aug .................... -2.4 ... 02 Feb ............... -2.4 on 2 Feb 1911

1912 ... 22.0 ... 15 & 16 July ............ -5.0 ... 04 Feb ............... -5.0 on 4 Feb 1912

1913 ... 18.9 ... 27 Sep .................... -1.9 ... 31 Dec ............... -0.9 on 30 Nov 1912 & 13 Jan 1913

1914 ... 21.0 ... 30 June ................... -0.4 ... 23 Jan ............... -1.9 on 31 Dec 1913

1915 ... 19.5 ... 08 June ................... -2.6 ... 27 Nov ............... -0.1 on 23 Dec 1914

1916 ... 20.0 ... 12 Aug .................... -2.3 ... 16 Dec ............... -2.6 on 27 Nov 1915

1917 ... 21.4 ... 17 June ................... -7.2 ... 07 Feb ............... -7.2 on 7 Feb 1917

1918 ... 21.0 ... 22 Aug .................... -3.3 ... 08 Jan ................ -3.3 on 8 Jan 1918

1919 ... 19.9 ... 16 Aug .................... -3.6 ... 09 Feb ................-3.6 on 9 Feb 1919

1920 ... 18.5 ... 25 May..................... -5.1 ... 13 Dec ............... -1.4 on 12 Nov 1919

1921 ... 22.3 ... 18 July .................... -0.5 ... 09 Nov ................ -5.1 on 13 Dec 1920

1922 ... 19.5 ... 23 May .................... -2.8 ... 06 Feb ............... -2.8 on 6 Feb 1922

1923 ... 24.0 ... 13 July ...,,............... -2.2 ... 27 Nov ......,......... +1.2 on 20 Feb 1923

1924 ... 21.2 ... 12 July .................... -1.7 ... 09 Jan ................ -2.2 on 27 Nov 1923

1925 ... 22.3 ... 22 July .................... -3.8 ... 04 Dec ................ +0.9 on 13 Mar 1925

1926 ... 22.1 ... 14 July .................... -4.8 ... 16 Jan ................. -4.8 on 16 Jan 1926

1927 ... 19.3 ... 06 Aug .................... -4.4 ... 19 Dec ................ -1.9 on 11 & 12 Feb 1927

1928 ... 19.2 ... 24 July .................... -1.5 ... 15 Dec ................ -4.4 on 19 Dec 1927

1929 ... 20.8 ... 16 July .................... -8.0 ... 15 Feb .................-8.0 on 15 Feb 1929

1930 ... 22.8 ... 27 Aug .................... -1.7 ... 17 Nov ................ -1.0 on 20 Mar 1930

1931 ... 18.7 ... 04 Aug .................... -2.1 ... 07 Mar ................ -2.1 on 7 Mar 1931

1932 ... 22.8 ... 19 Aug .................... -2.0 ... 10 Feb ............... -2.0 on 10 Feb 1932

1933 ... 22.2 ... 04 Aug ................... -3.0 ... 24 Jan ................ -3.0 on 24 Jan 1933

1934 ... 20.9 ... 07 July .................... -0.2 ... 02 Feb ................ -0.4 on 6 & 10 Dec 1933

1935 ... 22.0 ... 24 June ................... -4.0 ... 23 Dec ................ -0.2 on 9 & 28 Jan 1935

1936 ... 21.6 ... 21 June ................... -1.6 ... 13 Feb ............... -4.0 on 23 Dec 1935

1937 ... 21.4 ... 03 July .................... -1.1 ... 29 Jan & 18 Dec . -1.1 on 29 Jan 1937

1938 ... 20.8 ... 01 Aug .................... -4.2 ... 20 Dec ................ -1.1 on 18 Dec 1937

1939 ... 20.6 ... 07 June ................... -2.3 ... 30 Dec .................-4.2 on 20 Dec 1938

1940 ... 20.4 ... 08 & 09 June .......... -7.1 ... 21 Jan ................. -7.1 on 21 Jan 1940

1941 ... 22.5 ... 12 July .................... -3.6 ... 16 Jan ................ -3.6 on 16 Jan 1941

1942 ... 23.0 ... 28 Aug .................... -5.0 ... 21 Jan ................ -5.0 on 21 Jan 1942

1943 ... 23.4 ... 31 July .................... -1.4 ... 14 Dec ................ -0.9 on 4 Jan 1943

1944 ... 21.1 ... 29 May .................... -1.9 ... 26 Dec ............... -1.4 on 14 Dec 1943

1945 ... 21.0 ... 15 July .................... -7.6 ... 26 Jan ................ -7.6 on 26 Jan 1945

1946 ... 19.8 ... 02 July .................... -3.7 ... 20 Jan ................ -3.7 on 20 Jan 1946

1947 ... 23.0 ... 03 June ................... -6.7 ... 24 Feb ............... -6.7 on 24 Feb 1947

1948 ... 25.2 ... 29 July .................... -2.7 ... 21 Feb ............... -3.0 on 1 Dec 1947

1949 ... 22.4 ... 05 Sep .................... -0.6 ... 04 Feb ................-1.8 on 26 Dec 1948

1950 ... 22.5 ... 06 June ................... -2.8 ... 26 Jan ................ -2.8 on 26 Jan 1950

1951 ... 19.5 ... 21 July .................... -1.6 ... 29 Jan ................ -2.6 on 15 Dec 1950

1952 ... 22.5 ... 01 July .................... -3.7 ... 27 Jan ................ -3.7 on 27 Jan 1952

1953 ... 22.0 ... 12 Aug .................... -0.9 ... 05 Jan ................ -1.4 on 25 Nov 1952

1954 ... 18.2 ... 01 Sep .................... -5.0 ... 02 Feb ................ -5.0 on 2 Feb 1954

1955 ... 22.1 ... 22 & 23 Aug ............ -3.3 ... 20 Feb ............... -3.3 on 20 Feb 1955

1956 ... 18.7 ... 08 July & 22 Sep ..... -6.8 ... 01 Feb ............... -6.8 on 1 Feb 1956

1957 ... 22.3 ... 06 July ..................... -0.9 ... 16 Dec ............... -0.5 on 23 Nov 1956

1958 ... 20.0 ... 10 Aug .................... -2.8 ... 22 Jan ................ -2.8 on 22 Jan 1958

1959 ... 21.4 ... 20 Aug .................... -3.2 ... 14 & 16 Jan .........-3.2 on 14 & 16 Jan 1959

1960 ... 20.4 ... 05 June ................... -2.0 ... 14 Jan ................ -2.0 on 14 Jan 1960

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Posted (edited)

Table of annual extreme values continued, 1961 to 2018

YEAR .... MAX DAILY MEAN (date) .... MIN DAILY MEAN (date) .... Coldest Daily Mean of Winter
_____________________________________________________________________________

1961 ... 21.6 ... 29 Aug .................... -3.5 ... 28 Dec ................ -0.7 on 13 Dec 1960
1962 ... 18.0 ... 09 July .................... -4.9 ... 01 Jan ................ -4.9 on 01 Jan 1962
1963 ... 19.1 ... 30 July .................... -8.4 ... 23 Jan ................ -8.4 on 23 Jan 1963
1964 ... 19.4 ... 17 July .................... -2.3 ... 26 Dec ................ -2.3 on 23 Dec 1963
1965 ... 18.6 ... 12 Aug .................... -3.9 ... 03 Mar ................ -3.9 on 3 Mar 1965
1966 ... 19.5 ... 09 June ................... -4.9 ... 19 Jan ................ -4.9 on 19 Jan 1966
1967 ... 20.6 ... 17 July .................... -2.2 ... 08 Dec ................ -1.8 on 08 Jan 1967
1968 ... 21.8 ... 01 July .................... -2.5 ... 10 Jan ................ -2.5 on 10 Jan 1968
1969 ... 21.4 ... 16 July .................... -3.5 ... 08 Feb ................-3.5 on 8 Feb 1969
1970 ... 21.6 ... 07 July .................... -3.7 ... 07 Jan ................ -3.7 on 7 Jan 1970

1971 ... 19.9 ... 09 July .................... -3.4 ... 04 Jan ................ -3.4 on 4 Jan 1971
1972 ... 19.2 ... 18 July .................... -4.5 ... 31 Jan ................ -4.5 on 31 Jan 1972
1973 ... 20.9 ... 16 Aug .................... -1.7 ... 30 Nov ............... -1.5 on 15 Feb 1973
1974 ... 18.6 ... 15 Aug .................... -1.6 ... 01 Jan ................ -1.7 on 30 Nov 1973
1975 ... 23.7 ... 08 Aug ...................... 0.0 ... 14 Dec ............... +1.7 on 09 Feb 1975
1976 ... 24.7 ... 04 July .................... -2.0 ... 04 Dec ............... -1.2 on 30 Jan 1976
1977 ... 20.0 ... 05 July .................... -1.8 ... 12 Jan ................ -2.0 on 04 Dec 1976
1978 ... 19.6 ... 01 June ................... -3.5 ... 31 Dec ............... -3.3 on 11 Feb 1978
1979 ... 19.5 ... 12 Aug .................... -4.3 ... 28 Jan ................ -4.3 on 28 Jan 1979
1980 ... 20.7 ... 05 June ................... -1.9 ... 14 Jan ............... -1.9 on 14 Jan 1980

1981 ... 20.1 ... 05 Aug .................... -8.5 ... 12 Dec ................ -0.7 on 14 Feb 1981
1982 ... 21.3 ... 05 June ................... -7.6 ... 14 Jan ................ -8.5 on 12 Dec 1981
1983 ... 22.7 ... 13 July ..................... -1.5 ... 23 Nov ............... -1.0 on 10 Feb 1983
1984 ... 21.6 ... 21 Aug .................... -1.9 ... 15 Feb ............... -1.9 on 15 Feb 1984
1985 ... 20.2 ... 01 Oct ..................... -4.4 ... 17 Jan ................ -4.4 on 17 Jan 1985
1986 ... 21.9 ... 28 June ................... -4.6 ... 10 Feb ............... -4.6 on 10 Feb 1986
1987 ... 20.9 ... 20 Aug .................... -7.7 ... 12 Jan ................ -7.7 on 12 Jan 1987
1988 ... 19.3 ... 07 Aug .................... -0.1 ... 22 Nov ................ -0.7 on 10 Dec 1987
1989 ... 23.1 ... 22 July .................... -0.3 ... 26 Nov .................-0.1 on 22 Nov 1988
1990 ... 24.4 ... 03 Aug .................... +0.5 ... 15 Dec ............... -0.3 on 26 Nov 1989

1991 ... 20.6 ... 11 & 29 July ............ -4.7 ... 07 Feb ................ -4.7 on 07 Feb 1991
1992 ... 20.4 ... 29 June ................... -2.3 ... 22 Jan ................ -3.5 on 12 Dec 1991
1993 ... 19.4 ... 10 June .................. -2.9 ... 23 Nov ................ -2.4 on 29 Dec 1992
1994 ... 20.6 ... 24 July .................... -1.9 ... 14 Feb ................ -2.9 on 23 Nov 1993
1995 ... 24.9 ... 01 Aug .................... -4.7 ... 28 Dec ................ -1.2 on 3 Jan 1995
1996 ... 22.1 ... 19 Aug .................... -2.2 ... 07 Feb ................ -4.7 on 28 Dec 1995
1997 ... 22.6 ... 11 Aug .................... -2.6 ... 01 Jan ................ -2.6 on 01 Jan 1997
1998 ... 20.5 ... 11 Aug .................... -0.3 ... 06 Dec ............... +0.2 on 01 Feb 1998
1999 ... 21.7 ... 31 July .................... -2.2 ... 20 Dec ................-0.3 on 06 Dec 1998
2000 ... 21.5 ... 19 June .................. -1.9 ... 29 Dec ................ -2.2 on 20 Dec 1999

2001 ... 23.0 ... 29 July .................... -1.2 ... 16 Jan ................ -1.9 on 29 Dec 2000
2002 ... 21.6 ... 29 July .................... -1.8 ... 01 & 02 Jan ........ -1.8 on 1 & 2 Jan 2002
2003 ... 23.9 ... 09 Aug .................... -1.4 ... 07 Jan ................ -1.4 on 07 Jan 2003
2004 ... 21.7 ... 08 Aug ................... +0.5 ... 29 Jan & 20 Dec.. +0.5 on 30 Dec 2003 & 29 Jan 2004
2005 ... 22.1 ... 19 June .................. -1.0 ... 29 Dec ................ +0.4 on 23 Feb 2005
2006 ... 24.5 ... 19 July .................... -1.4 ... 02 Feb ................ -1.4 on 2 Feb 2006
2007 ... 19.7 ... 05 Aug .................... -1.5 ... 07 & 08 Feb ....... -1.5 on 7 & 8 Feb 2007
2008 ... 21.1 ... 28 July .................... -2.5 ... 31 Dec ................ -0.5 on 21 Dec 2007
2009 ... 22.5 ... 01 July .................... -3.0 ... 06 Jan .................-3.0 on 6 Jan 2009
2010 ... 19.9 ... 10 July .................... -7.0 ... 20 Dec ................ -4.6 on 7 Jan 2010

2011 ... 22.0 ... 27 June ................... -1.4 ... 29 Jan ................ -7.0 on 20 Dec 2010
2012 ... 20.3 ... 18 Aug .................... -3.0 ... 04 Feb ............... -3.0 on 4 Feb 2012
2013 ... 22.7 ... 01 Aug .................... -2.9 ... 16 Jan ................ -2.9 on 16 Jan 2013

2014 ... 21.0 ... 18 July .................... +0.8 ... 29 Dec ............... +2.5 on 23 Nov 2013 *

2015 ... 24.6 ... 01 July ..................... -0.3 ... 2 Feb .................. -0.3 on 2 Feb 2015

2016 ... 23.5 ... 20 July ..................... +0.3 .. 16 Jan ................ +0.3 on 16 Jan 2016

2017 ... 21.9 ... 19 June ....................--0.4 ... 12 Dec ............... --0.1 on 26 Jan 2017

2018 ... 22.5 ... 27 July ..................... --3.8 ... 1 Mar .................--3.8 on 1 Mar 2018

_______________________________________________________________

* highest such value in the entire record, previously +1.7 (1974-1975). 

... the annual minimum of +0.8 was not as mild as +0.9 in 1863. 

Edited by Roger J Smith
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Summary of the Annual extremes (see last four posts for tables)

Highest Daily Mean for each of 247 years 1772 to 2018

The range of dates is 15 May (1833, tied) to 01 October (1985).

The count by month (assigning 0.5 to tied values in different months) is

MAY .. 3.5 (4)

JUN .. 47.0 (48)

JUL .. 108.5 (111)

AUG .. 75.0 (76)

SEP .. 12.0 (13)

OCT ... 1.0 (1)

The number in brackets gives the number of years in which the month at least shares in the category of highest daily mean. For example, August had two cases of dates tied with other months, so the count was 75.0, the number of cases was 76. A case where a month has more than one day does not affect this, there were about half a dozen such cases, usually consecutive days or nearby days in a warm spell. One year actually had three days tied, all in July.

Despite July coming ahead of August in this count, the highest frequency on any one date is 8 on the 12th of August. Other dates that scored five or more include 5 June (5), 5 July (7), 9, 12, 16, 17 July (all made it to five with one tie included), 20. 22, 24 and 29 July (all at 6) , and 5 Aug (5). There seems to be a little flicker of warmth near the end of September into the first of October given that one case fell in the period 15-26 September, then three from 27 Sep to 1 Oct.

Periods with very few annual extremes within the summer months include 11-14 June (zero) and from 21 to 26 August which totalled 5.0 including two ties. The frequency after that period is not much greater but given the seasonal distribution that part of August stands out a bit. There are ten cases between 27 August and 2 September.

The long-term average of the warmest day is 21.0 while the average since 1901 is 21.2 ... in the warmer period 1975 to 2006 the average was 21.9. The average for the past four years (2015 to 2018) is 23.1 ... the last time four consecutive years all exceeded 21.8 was 1947 to 1950 (when 22.5 was the lowest maximum).

The highest extremes are probably a lot better known to weather "buffs" than the lowest annual max values, so I had a look at those. 1860 and 1862 stand out with 17.2 and 17.3 the best those years could manage. A more recent period of cool summers appears 1962-66, five years when the value 20.0 was never achieved.

 

__Annual Minimum Daily Means 1772-2018 and coldest of winter seasons__

Note that 1786 could have had a coldest annual value in December, the data are missing, but it is not as likely as the winter seasonal minimum for 1786-87 which I have assigned to December on probability (see the table for that period for details).

Not every annual minimum is a winter minimum, but there are two cases where a year managed to secure two different coldest of winter from tied values at either end of the year. There are numerous cases where a year claims two winters, as well as those where it claims neither of its two potential winter coldest readings.

The following count for coldest mean daily per year follow the same logic as the max, the number includes 0.5 for ties in different months, and the number in brackets gives the number of times the month at least had a share.

NOV ... 13.5 (14)

DEC ... 74.5 (76)

JAN .. 104.5 (107)

FEB ... 49.0 (50)

MAR ... 5.5 (6)

Despite the fact that January and February CET means are often very close in 30-year periods and not that different (3, 4) over a longer term, January and even December score higher than February on this index. A small part of the reason is length of month, February has only 90% of the time available, but probably the bigger reason is solar angle, a cold February day can achieve a somewhat higher maximum.

The most frequent date for the annual minimum is 1 Jan (count 8.0, 9 instances, so twice this date tied both times with 2 Jan). 28 December had a count of 7.5 with 8 instances. 22 December scored six while 23 January scored five and otherwise the count remains fairly even at about 2-4 per day through the heart of the winter season which appears to be 15 Dec to 15 Feb.

In the heart of the winter season, the dates that did least well at scoring a coldest of year include 3 and 5 Feb around the time when the annual temperature curve shows a bit of a spike.

The range of dates is 9 Nov (1921) to 21 March 1872 (later tied on 11 Dec).

The average of this annual minimum over the entire 245-year period is -3.7, and this has risen to reach -3.0 since 1901. From 1988 to 2007 a two-decade mean of -1.6 was observed, but this has fallen back to -2.0 for the twenty-five years 1988-2012. For a ten-year period 1795 to 1804, the average was as low as -6.0 ... and this appears to be about the same value that other colder periods have had, although most of those did not last ten years, for example, 1890-95 (six years) managed an average of -6.3. The ten-year average of -4.6 from 1978 to 1987 was not often bettered in the colder 19th century or late 18th century.

Meanwhile, the winter seasonal count looks very similar, although about one-third of winter seasonal minimum values are not annual minima for their particular year. The various possibilities seem to cancel out almost equally, but February does score a bit higher.

NOV ... 14.5 (15)

DEC ... 69.0 (70)

JAN .... 99.5 (102)

FEB ... 54.0 (55)

MAR ...10.0 (10)

The range in this variable runs from 12 Nov 1919 (for winter 1919-20) to 21 March 1899 (coldest of winter 1898-99).

Since quite a few years use up two cold annual values in the seasonal count, the long-term mean of this index is higher, at -3.5, and has risen to -2.9 since 1901. The recent winter season values are more similar to the annual values.

The coldest annual minimum which was not also its own winter minimum is -7.6 for (Jan) 1982, followed by -6.6 for (Jan) 1785. One of two tied values in 1784 (-6.7 in January) was not coldest of its winter but the other tied value (Dec 1784) was. 

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Greatest Changes in mean daily C.E.T. (from day to day)

I ran a program on the daily CET values to find out the largest changes from one day to the next, over the period 1772-present.

There were three days that warmed by more than 10 C deg, they were:

Feb 7, 1830 ... 11.2 warmer (4.8 from -6.4)

Jan 4, 1836 ... 10.7 warmer (8.2 from -2.5)

Jan 21, 1838 ... 10.5 warmer (-1.4 from coldest day on record -11.9)

These cover the largest increases for Jan and Feb. The rest of the monthly records are as follows:

Mar. 12, 1805 ... 8.2 warmer (11.5 from 3.3)

Apr. 15, 1868 ... 7.4 warmer (12.9 from 5.5)

May 17, 1854 ... 7.1 warmer (13.1 from 6.0)

June 1, 1869 ... 6.9 warmer (14.4 from 7.5)

July 9, 1903 ... 6.9 warmer (20.2 from 13.3)

Aug. 27, 1864 ... 6.2 warmer (15.0 from 8.8 )

Sep. 4, 1869 ... 7.4 warmer (18.5 from 11.1)

Oct. 21, 1833 ... 7.0 warmer (12.9 from 5.9)

Nov. 26, 1797 ... 9.6 warmer (9.8 from 0.2)

Dec. 8, 1847 ... 8.9 warmer (10.7 from 1.8 )

-------------------

Meanwhile, the largest day to day falls in CET daily means were all less than 10 degrees, the largest was 9.9 degrees in November 1836.

Monthly records are ...

Jan. 6, 1982 ... 8.5 (-0.1 from 8.4)

Feb. 26, 1780 ... 8.0 (-2.4 from 5.6)

Mar. 5, 1821 ... 8.5 (0.7 from 9.2)

Mar. 28, 1777 ... 8.5 (6.3 from 14.8 )

Apr. 16, 1779 ... 8.5 (7.3 from 15.8 )

May 11, 1773 ... 9.1 (4.1 from 13.2)

June 7, 1942 ... 8.3 (12.8 from 21.1)

Jul. 23, 1868 ... 8.5 (14.7 from 23.2)

Aug. 29, 1838 ... 7.2 (11.5 from 18.7)

Sep. 16, 1819 ... 8.6 (8.9 from 17.5)

Oct. 16, 1955 ... 9.3 (3.7 from 13.0)

Nov. 25, 1836 ... 9.9 (0.4 from 10.3)

Dec. 14, 1994 ... 8.9 (2.4 from 11.3)

----------------------------------------------------

Note that the majority of these monthly records were set before 1870 and only a few have occurred recently, and in the lifetime of most people reading this, no day has warmed more than 7 degrees (by mean CET), the largest increase since 1980 is 5.8 deg from 30 Nov. 1985, while there was a 6.4 deg rise on 6 Jan 1971. More recently the largest rise was 4.9 deg to set a new monthly record for March on the 29th of 2017 (15.1 from 10.2 the previous day). That was the largest rise since a jump of 5.4 deg from 25 to 26 Jan 2013. 

There were several rather large decreases in that past year or so.

17 Mar 2018 (0.7) was 8.2 deg colder than 16 Mar (8.9) not quite reaching the monthly extreme of 8.5 deg set in 1821.

14 Oct 2018 (11.1) was 7.4 deg colder than 13 Oct (record high 18.5). 

Before those, 8 Dec 2017 (1.9) was 7.1 deg colder than 7 Dec (9.0).

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Longest Cold Spells

(consecutive days with means 0.0 or lower)

NOTE -- Data from 1772 to present, there were probably very long cold spells in years such as 1684, 1709 and 1740 but we don't have the daily details for those.

This table includes all cases with 10 or more such days.

Days _ Duration of Days 0.0 or lower ________________ Coldest ____ Average

_____________________________________________________________

32 ... ... 27 Dec 1813 - 27 Jan 1814 ........................................ -- 6.7 ...... -- 3.2

26 ... ... 7 Jan - 1 Feb 1776 ......................................................-- 7.5 ...... -- 3.0

22 ... ... 5 - 26 Feb 1947 .......................................................... -- 6.7 ...... -- 2.5 ****

20 ... ... 8 - 27 Jan 1881 .......................................................... -- 8.1 ...... -- 4.6

20 ... ... 7 - 26 Jan 1963 .......................................................... --8.4 ...... -- 3.6 ***

18 ... ... 6 - 23 Feb 1855 .......................................................... -- 7.5 ...... -- 3.7

18 ... ... 9 - 26 Jan 1823 ........................................................... -- 8.9 ...... -- 3.0

18 ... ... 9 - 26 Dec 1890 ........................................................... -- 6.8 ...... -- 2.1

17 ... ... 10 - 26 Jan 1795 ......................................................... -- 8.9 ...... -- 4.0

15 ... ... 21 Dec 1870 - 4 Jan 1871 ........................................... -- 6.9 ...... -- 3.6

15... ... 10-24 Jan 1940 ............................................................. -- 7.1 ...... -- 3.3

15 ... ... 24 Dec 1892 - 7 Jan 1893 ........................................... -- 5.0 ...... -- 3.3

15 ... ... 18 Jan - 1 Feb 1784 ..................................................... -- 3.7 ...... -- 2.1

14 ... ... 8 - 21 Jan 1838 ........................................................... -- 11.9 ...... -- 5.1

14 ... ... 5-18 Feb 1895 .............................................................. -- 8.3 ...... -- 4.8**

14 ... ... 3-16 Jan 1820 .............................................................. -- 8.5 ...... -- 3.6

14 ... ... 21 Jan - 3 Feb 1780 ..................................................... -- 3.6 ...... -- 1.0

13 ... ... 26 Jan - 7 Feb 1954 ..................................................... -- 5.0 ...... -- 2.5

13 ... ... 17 - 29 Dec 1860 .......................................................... -- 3.7 ...... -- 2.1^

13 ... ... 6 - 18 Feb 1986 ............................................................ -- 4.6 ...... -- 1.6

13 ... ... 14 - 26 Feb 1956 ........................................................... -- 3.2 ...... -- 1.6

13 ... ... 29 Dec - 10 Jan 1811 .................................................... -- 3.6 ...... -- 1.5

12 ...... 6-17 Jan 1987 ................................................................ -- 7.7 ...... -- 2.6

12 ... ... 23 Dec 1962 - 3 Jan 1963 ............................................ -- 3.6 ...... -- 2.2 ***

12 ... ... 18 - 29 Jan 1880 ........................................................... -- 4.3 ...... -- 2.1

12 ... ... 3 - 14 Feb 1991 ............................................................ -- 4.7 ...... -- 1.9

12 ... ... 25 Dec 1853 - 5 Jan 1854 ............................................ -- 5.0 ...... -- 1.8

12 ... ... 30 Nov - 11 Dec 1796 .................................................. -- 4.7 ...... -- 1.8

12 ...... 17 - 28 Feb 1955 ........................................................... -- 3.3 ...... -- 1.7

11 ...... 17 - 27 Dec 2010 ........................................................... -- 7.0 ...... -- 3.9

11 ...... 11 - 21 Jan 1867 ............................................................. -- 5.0 ...... -- 2.9

11 ... ... 1 - 11 Feb 1917 .............................................................. -- 7.2 ...... -- 2.8 *

11 ... ... 9 - 19 Feb 1985 ............................................................. -- 4.1 ...... -- 2.7

11 ... ... 2-12 Jan 1879 ................................................................ -- 4.8 ...... -- 2.3

11 ... ... 6 - 16 Jan 1850 .............................................................. -- 2.8 ...... -- 1.4

11 ... ... 25 Dec 1820 - 4 Jan 1821 ............................................. -- 3.3 ...... -- 1.3

11 ... ... 11 - 21 Feb 1853 ............................................................ -- 3.2 ...... -- 1.2

11 ... ... 9 - 19 Feb 1940 .............................................................. --2.5 ....... --1.1

10 ...... 6-15 Jan 1982 ................................................................. --7.6 ...... -- 4.0

10 ... ... 8 - 17 Jan 1826 ...............................................................-- 6.9..... -- 3.7

10 ... ... 20 - 29 Jan 1945 ............................................................ -- 7.6 ...... -- 3.5

10 ... ... 5 - 14 Dec 1844 ..............................................................-- 5.5 ...... -- 2.7

10 ... ... 8 - 17 Dec 1878 .............................................................. -- 5.3 ...... -- 2.9^^

10 ... ... 16 - 25 Jan 1829 ............................................................. -- 4.8 ...... -- 2.8

10 ... ... 14 - 23 Jan 1809 ............................................................. -- 5.1 ...... -- 2.4

10 ... ... 24 Dec 1836 - 2 Jan 1837 ............................................... -- 3.3 ...... -- 1.3

10 ... ... 23 Dec 1837 - 1 Jan 1838 ............................................... -- 2.7 ...... -- 1.4

10 ... ... 21 - 30 Jan 1917 ............................................................. -- 1.8 ...... -- 1.1 *

__________________________________________________

^ Most of the period 1-16 Jan 1861 was also subzero, the 31-day period 17 Dec 1860 to 16 Jan 1861 averaged -1.3 C.

^^ This cold spell extended from 7 to 26 Dec, 20 days in which the mean CET was --2.4 C. The interval 20-25 Dec was --3.7 C.

* Except for +0.3 on 31 Jan 1917, a 22 day spell avg --1.8 C lasting 21 Jan to 11 Feb.

** A longer spell of 24 days with +0.4 as warmest, 26 Jan - 18 Feb 1895, avg --3.7 C.

*** Although there were only two spells in winter 1962-63 that qualified for this list, note that the period of 35 days that includes the two, 23 Dec to 26 Jan, averaged -2.7 C and 70 days to 2 March averaged -- 1.5 C.

**** The 45-day period 23 Jan to 8 Mar 1947 averaged --1.9 C.

<<>> RECENT NEAR MISSES & EXPANSION OF 1986 FROM LIST <<>>

25 Nov to 4 Dec 2010 averaged -- 1.7 C and 25 Nov to 8 Dec averaged -- 1.7 C but these periods failed by a slight margin to make the list (25 Nov was +0.3 and 5 Dec was +0.4).

The 26-day period from 6 Feb to 3 Mar 1986 averaged -- 1.2 C.

The 15-day period from 5 to 19 Jan 1985 averaged --1.7 C. (11th not subzero so it has no ten-day interval)

1 to 10 Jan 2010 averaged --1.9 C but failed to make the list because 2 Jan was +0.3 C.

16 to 25 Jan 2013 averaged --0.9 C but failed to make the list because 24 Jan was +0.7 C.

8-26 Dec 1981 averaged -- 2.3 C.

___________________________________

honourable mention should be given to 11-20 March 1845, there were two days in that 10-day interval slightly above zero but the average so late in the season was --1.7 C and contains the coldest March day (-6.5 on 13th). Also, in terms of a sustained cold anomaly, 21 March to 1st April 2013 (12 days) had a mean of +1.2 C. 1785 was even colder at the same time of year, 13 days from 22 March to 3 April had an average of +0.8 C. In terms of early winter season sustained cold, the interval 11-16 Nov 1919 averaged --0.3 C. 

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Longest Hot Spells

 

This table lists all spells with mean daily CET values at or above 20.0 C lasting at least seven days, in the period 1772 to 2012. Rank by length and as second determinant max value.Actual values in brackets are not in the qualifying period but added at either end to illustrate longevity of warm spell when these end days are  >19C. Where end days are cooler than 19, no entries appear in brackets.

The duration of the qualifying hot spells refers to the dates not in brackets, those dates can be derived from counting backward or forward from end dates.

 

Rank __ Period ___________________ Actual values with warmest in bold

 

1 ___ 14d __ 25 June to 8 July 1976

_______ (20.7,19.2) 21.0,22.3,22.5,22.6,22.4,22.1,22.9,22.8,24.6,24.7,23.9,23.3,22.6,21.4 (19.4)

_________and seven further very warm days mainly above 18, a total spell of 24 very warm days.

2 ___ 10d __ 8 Jul to 17 Jul 1983

_______(19.1,19.3,19.7) 20.3,20.6,20.3,21.6,22.6,22.7,22.1,22.4,22.5,21.2 (19.8.)

_________ a total of 14 very warm days.

3 ____ 9d __ 4 Aug to 12 Aug 2003

_______20.5,23.1,22.5,21.5,21.1,23.9,22.4,21.4,21.4 (19.1) (a total of 10d)

4 ____ 8d __ 28 Jul to 4 Aug 1995

_______ (20.5,20.5,19.5) 20.2,21.1,21.2,23.4,24.9,24.6,23.4,20.5 (total of 11d)

5 ____ 8d __ 12 Jul to 19 Jul 1808

________22,4,24.5,24.4,20.7,22.0,20.2,21.2,21.7

6 ____ 8d __ 6 Aug to 13 Aug 1997

________ 20.1,21.5,22.0,21.7,22.5,22.6,21.5,20.6 (part of 18d spell)

7 ____ 8d __ 15 Aug to 22 Aug 1947

____ ____ (19.7,19.3) 20.4,21.6,22.0,22.1,20.9,20.0,20.1,20.0 (19.1) a total of 11 very warm days.

8 ____ 7d __ 3 Aug to 9 Aug 1975

____ ____ (19.3,19.8.) 22.0,23.4,22.1,20.8,22.8,23.7,21.0** (total of 9d)

9 ____ 7d __ 16 Aug to 22 Aug 1995

________ (19.1) 20.4,20.8,21.7,22.1,21.9,21.4,21.4 (13d starting 10 Aug to 22 Aug generally above 19)

 

These are all cases where all but one day (seven or more in total) hit 20.0, regardless of value of cooler day. Spells may contain two cooler days if total length exceeds ten. Rank by length and as second determinant max value. Ranks refer to the length of qualifying period. By definition, all six day spells of consecutive 20+ days are included. That would extend the ranking of the above list as follows. Spell 1 below ranks 10, spell 3 ranks 11, spell 4 ranks 12, and spell 7 ranks 13th for consecutive 20+ days.

 

Rank __ Period ___________________ Actual values with warmest in bold

 

1 ___ 11d __ 17 Jul to 27 Jul 2006 ____

________(19.3) 20.9,22.1,24.5,22.7,21.7,21.9,19.6,20.0,22.7,23,2,21,2 (19.8,19.5,19.0) 15 days in total

2 ___ 11d __ 6 Jul to 16 Jul 1793

________20.0,21.9,20.0,17.6,20.6,20.3,20.7,20.3,18.8,20.6,22.2,(19.8.) (12d incl 17th)

3 ____ 7d __ 14 Jul to 20 Jul 1825

___ _____ (19.2,19.6),20.0,23.7,21.3,21.2,23.3,23.5,19.7

4 ____ 7d __ 20 Jul to 26 Jul 1989

_________ 20.5,22.7,23.1,22.4,22.1,21.3,19.1

5 ____ 7d __ 12 Aug to 18 Aug 1893

_________ 20.2,19.8,21.1,22.1,21.0,22.0,22.6 (19.6)*

6 ____ 7d __ 16 Aug to 22 Aug 1997

_________ (19.0,19.2) 20.3,20.6,20.8,22.1,21.2,19.4,20.3 (19.7) (see above, 18d spell in total)

7 ____ 7d __ 6 Jul to 12 Jul 1934

_________ 20.2,20.9,20.4,20.4,20.3,20.2,19.3

 

_________________________________________________

 

14 days from 26 June to 9 July 1826 were warmer than 19.3, the spell failed to qualify above, max 22.8 on 27 June.

14 days from 7 to 20 July 1921 were warmer than 18.0, the spell failed to qualify above, max 22.3 on 18 July.

13 days from 4 July to 16 July 1852 were warmer than 18.5, the spell failed to qualify above, max 24.0 on 5 July.

*12 days from 8 Aug to 19 Aug 1893 were warmer than 18.4, the spell produced a 7d qualifying period above.

** 20 days from 27 July to 15 Aug 1995 were warmer than 18.2 and the 7 days 3-9 Aug qualified with consecutive days above 20, other separate periods would not have qualified for the "almost" section.

Not all hot summers have lengthy spells above 19, for example, July 1868 had numerous days above 19.0 but spells of only 5 or 6 days with interruptions. Then July and August 1911 had many hot days but again, no qualifying spells, the closest was 8 days 7-14 August where five were above 20 but not consecutively.A nine day spell in July 1923 (6-14 Jul) also failed to qualify despite six (non-consecutive) days above 20 and a max of 24.0 on the 13th. The hottest day on record in late July 1948 (25.2, 29th) was part of five conseutive days above 20 but that spell failed to start and end with qualifying days and was relatively isolated otherwise. A similar outcome was found the next July (1949) from 23rd to 27th although this was a less intense hot spell. The hot spell in August 1990 was only four days of 20+ days and two others over 18. Five hot days 10-14 July 2005 also fell short.

An early summer period that failed to qualify was seven days from 29 May to 4 June 1947, there were five non-consecutive days above 20 in that spell.

Summer 2018 did not quite qualify for the second list with a six-day spell 22-27 July all over 19.0 being its longest hot spell, and twice recording three consecutive 20+ days (7-9 and 22-24 July). Summer 2017 had a five-day spell all over 20 (17-21 June). July 2014 had a four-day spell over 20 (23-26 July). And although it was quite hot 13th-25th July 2013, the longest spell over 20 was three days (17th-19th).

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After the above post appeared in 2013, Aderyn Coch posted a list of heat waves using a slightly different criterion. I adapted that list to the following table which is now extended to 2018 ... the list is chronological rather than rank ordered.

Summer heat waves -- ten days or more with every day 18.0+. 

DURATION __ RANK for LENGTH __ RANK for AVG CET (first 10)  ____ DATES (continuously above 18.0) & MEAN CET

11 _________ 20t ________ xx ______ 5-15th August 1773 ______19.65

13 _________ 14 ________ xx _______8-20th July 1783 ________ 19.48

10 _________ 25t ________ 3 _______11-20th July 1808 ________ 21.40

 9 __________ --- ________ --- ______ 12th-20th July 1825^__(21.28 - 9 days) 20.93 for 10 days

16 __________ 5t ________ xx ______ 26th June - 11th July 1826 _ 20.26

12 _________ 15t ________ xx ______ 11-22nd June 1846 _______19.94

14 _________ 10t ________ xx ______ 4-17th July 1852 _________ 20.38

14 _________ 10t ________ xx _______8th-21st August 1893 ____ 20.36

11 _________ 20t ________ xx _______18-28th July 1900 _______ 19.98

10 _________ 25t ________ xx _______ 25th July -- 3rd Aug 1911 _ 20.08

14 _________ 10t ________ 10 ________7-20th July 1921 _______ 20.45

11 _________ 20t _________ 9 ________5-15th July 1923 _______ 20.66

12 _________ 15t ________ xx _______31st July -- 11th Aug 1938 _ 19.09

10 _________ 25t ________ xx _______25th July -- 3rd Aug 1947 __19.71

12 _________ 15t ________ xx _______12-23rd August 1947 _____ 20.28

12 _________ 15t ________ xx ________7-18th July 1955 ________19.43

11 _________ 20t ________ xx _______16-26th August 1955 ______19.95

20 __________ 1 ________ xx _______ 27th July -- 15th Aug 1975 _ 20.35

18 _________ 2t _________ 1 ________22nd June -- 9th July 1976 _ 22.04

16 _________ 5t _________ xx _______11-26th August 1976 ______ 19.05

15 _________ 8t _________ 7 ________ 4-18th July 1983 _________ 20.81

10 _________ 25t ________ xx _______ 22-31st July 1983 ________ 19.45

10 _________ 25t ________ xx ________17-26th August 1983 _____ 18.98

10 _________ 25t ________ 8 ________ 17-26th July 1989 ________ 20.67

14 _________ 10t ________ 5 ________ 24th July -- 6th August 1995_21.04

18 _________ 2t __________ 6 ________6-23rd August 1997 ______ 20.84

10 _________ 25t _________ 2 ________4-13th August 2003 ______ 21.69

12 _________ 15t ________ xx ________1-12th August 2004 _______19.71

15 _________ 8t _________ 4 _________16-30th July 2006 ________ 21.21

17 _________ 4 _________ xx _________13-29th July 2013 ________19.56*

11 _________ 20t ________ xx _________17-27th July 2014 _______ 19.90

16 _________ 5t _________ xx _________ 25th June-10th July 2018 _ 19.34**

 

*with one day at 17.7 (30th July) this spell went to 21 days (ending 2 Aug) same CET of 19.56

**with one day at 17.5 (11th July) this spell went to 22 days (ending 16 July) with CET of 19.17

^ (the spell in July 1825 failed to extend to ten days (11th was 17.6) but comes very close to matching some of the hotter spells)

__________________________________________________

 

NOTES:

 

Ranking for mean temp shows only the top ten because it is likely that below that range, the spells shown here have been matched by more variable spells (not consecutively > 18.0) of similar durations. The 1976 spell is even more remarkable when you consider that a further week of hot weather occurred after one day failed to reach 18.0. Many hot summers could not quite generate a spell that qualified for this particular listing, 1868 for example had numerous days above 18.0 between 7th July and 10th August but failed to produce ten consecutive days that warm. 

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CET normal values for every 30-year period starting with 1661-1690 ending with 1981-2010

(and most recent 30 years 1989-2018) ... if lines overflow, reduce screen magnification (125% or lower should work)

 

30-yr period _____ JAN __ FEB __ MAR __ APR __ MAY __ JUN __ JUL __ AUG __ SEP __ OCT __ NOV __ DEC__YEAR

 

(all data 1659-2018)_3.3 ___3.9 ___5.3 ___7.9 __ 11.2 __ 14.3 __ 16.0 __ 15.6 __ 13.3 ___9.7 ___6.1 ___4.1 __ 9.2

 

1661-1690 _______ 2.9 ___3.1 ___4.8 ___7.4 __ 11.0 __ 14.3 __ 15.8 __ 15.3 __ 12.8 ___9.4 ___5.7 ___3.4 __ 8.8

1671-1700________2.6 ___2.6 ___4.4 ___7.1 __ 10.7 __ 13.9 __ 15.5 __ 14.9 __ 12.3 ___9.0 ___5.3 ___3.3 __ 8.5

1681-1710________2.4 ___3.0 ___4.5 ___7.3 __ 10.8 __ 13.9 __ 15.5 __ 15.3 __ 12.6 ___9.0 ___5.6 ___4.0 __ 8.6

1691-1720________2.6 ___3.3 ___4.7 ___7.4 __ 10.7 __ 14.0 __ 15.8 __ 15.5 __ 12.9 ___9.1 ___5.8 ___3.8 __ 8.8

1701-1730________3.1 ___3.8 ___5.1 ___7.9 __ 11.3 __ 14.4 __ 15.9 __ 15.8 __ 13.6 ___9.5 ___6.4 ___4.0 __ 9.2

1711-1740________3.4 ___4.0 ___5.4 ___8.1 __ 11.2 __ 14.6 __ 16.0 __ 15.7 __ 13.8 ___9.7 ___6.2 ___4.1 __ 9.3

1721-1750________3.4 ___3.9 ___5.2 ___7.8 __ 11.4 __ 14.5 __ 16.0 __ 15.9 __ 14.0 ___9.6 ___6.3 ___4.2 __ 9.3

1731-1760________3.3 ___3.8 ___5.2 ___7.7 __ 11.2 __ 14.5 __ 16.1 __ 15.8 __ 13.8 ___9.4 ___5.8 ___4.2 __ 9.2

1741-1770________2.9 ___3.7 ___4.8 ___7.6 __ 11.2 __ 14.3 __ 16.0 __ 15.7 __ 13.6 ___9.2 ___5.7 ___3.9 __ 9.0

1751-1780________2.4 ___3.7 ___5.3 ___7.9 __ 11.2 __ 14.5 __ 16.1 __ 15.8 __ 13.4 ___9.3 ___5.6 ___3.7 __ 9.0

1761-1790________2.4 ___3.7 ___4.8 ___7.9 __ 11.5 __ 14.6 __ 16.1 __ 15.9 __ 13.3 ___9.2 ___5.5 ___3.7 __ 9.0

1771-1800________2.4 ___3.8 ___4.9 ___8.1 __ 11.4 __ 14.7 __ 16.3 __ 15.9 __ 13.3 ___9.2 ___5.5 ___3.5 __ 9.1

1781-1810________2.9 ___3.8 ___4.6 ___8.0 __ 11.5 __ 14.6 __ 16.1 __ 15.8 __ 13.2 ___9.4 ___5.3 ___3.2 __ 9.0

1791-1820________2.5 ___4.0 ___5.1 ___8.0 __ 11.2 __ 14.2 __ 15.9 __ 15.6 __ 13.1 ___9.5 ___5.5 ___3.2 __ 9.0

1801-1830________2.4 ___3.9 ___5.5 ___7.9 __ 11.4 __ 14.2 __ 15.8 __ 15.8 __ 13.1 ___9.8 ___5.9 ___3.6 __ 9.1

1811-1840________2.3 ___4.0 ___5.4 ___7.9 __ 11.4 __ 14.4 __ 15.7 __ 15.6 __ 13.0 ___9.8 ___6.1 ___4.0 __ 9.1

1821-1850________2.6 ___3.9 ___5.5 ___8.0 __ 11.6 __ 14.7 __ 15.7 __ 15.3 __ 13.0 ___9.6 ___6.3 ___4.5 __ 9.2

1831-1860________3.2 ___3.7 ___5.2 ___7.8 __ 11.2 __ 14.6 __ 15.7 __ 15.4 __ 13.0 ___9.6 ___5.8 ___4.3 __ 9.1

1841-1870________3.4 ___3.9 ___5.2 ___8.2 __ 11.2 __ 14.4 __ 15.8 __ 15.4 __ 13.2 ___9.6 ___5.7 ___4.3 __ 9.2

1851-1880________3.7 ___4.2 ___5.2 ___8.2 __ 10.8 __ 14.2 __ 15.9 __ 15.6 __ 13.2 ___9.7 ___5.3 ___4.1 __ 9.2

1861-1890________3.5 ___4.5 ___5.1 ___8.1 __ 10.9 __ 14.1 __ 15.8 __ 15.4 __ 13.2 ___9.3 ___5.7 ___3.8 __ 9.1

1871-1900________3.4 ___4.2 ___5.2 ___7.9 __ 10.7 __ 14.2 __ 15.8 __ 15.5 __ 13.1 ___9.0 ___6.1 ___3.7 __ 9.1

1881-1910________3.5 ___3.9 ___5.1 ___7.7 __ 10.9 __ 14.1 __ 15.7 __ 15.2 __ 13.1 ___9.3 ___6.3 ___4.0 __ 9.1

1891-1920________3.7 ___4.1 ___5.3 ___7.9 __ 11.3 __ 14.1 __ 15.7 __ 15.4 __ 13.1 ___9.4 ___6.2 ___4.5 __ 9.2

1901-1930________4.2 ___4.2 ___5.5 ___8.0 __ 11.3 __ 13.8 __ 15.8 __ 15.2 __ 13.1 ___9.8 ___5.8 ___4.5 __ 9.2

1911-1940________4.2 ___4.3 ___5.7 ___8.2 __ 11.5 __ 14.2 __ 15.9 __ 15.6 __ 13.3 ___9.6 ___6.2 ___4.6 __ 9.4

1921-1950________3.9 ___4.2 ___5.9 ___8.0 __ 11.3 __ 14.4 __ 16.3 __ 15.9 __ 13.6 __10.0 ___6.4 ___4.5 __ 9.5

1931-1960________3.5 ___3.9 ___5.9 ___8.1 __ 11.5 __ 14.6 __ 16.2 __ 16.0 __ 13.7 __10.1 ___6.8 ___4.7 __ 9.6

1941-1970________3.3 ___3.6 ___5.7 ___8.1 __ 11.4 __ 14.5 __ 16.0 __ 15.7 __ 13.7 __10.6 ___6.6 ___4.4 __ 9.5

1951-1980________3.6 ___3.7 ___5.6 ___8.0 __ 11.3 __ 14.3 __ 15.9 __ 15.6 __ 13.6 __10.5 ___6.6 ___4.7 __ 9.4

1961-1990________3.8 ___3.8 ___5.7 ___7.9 __ 11.2 __ 14.2 __ 16.1 __ 15.8 __ 13.6 __10.6 ___6.6 ___4.7 __ 9.5

1971-2000________4.2 ___4.2 ___6.3 ___8.1 __ 11.3 __ 14.1 __ 16.5 __ 16.2 __ 13.7 __10.4 ___6.9 ___5.1 __ 9.7

1981-2010________4.4 ___4.4 ___6.6 ___8.5 __ 11.7 __ 14.5 __ 16.7 __ 16.4 __ 14.0 __10.7 ___7.1 ___4.6 __10.0

 

1989-2018________4.7 ___4.9 ___6.8 ___8.8 __ 12.0 __ 14.6 __ 16.9 __ 16.5 __ 14.2 __11.0 ___7.0 ___4.9 __10.2

 

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Looks like the period 1901-1930 was pretty drab..very mild winters followed by very cool summers.

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Yes, 1920 and 1922 seem like really the worst summers imaginable, with very good summers in 1921 and 1923. That interval of 1901-1930 is also noteworthy for some very chilly spells in spring and autumn. 

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Significant record daily CET values

  

 A "significant" record is defined as one that is either earliest or latest on record.  This is the list generated ...

 

RECORD MAXIMUM

10.8 __ 1 Jan 1851 (not valid, only appears due to calendar)

11.6 __ 3 Jan 1932

 (9.8 on 28 Jan 1944 is lowest of year)

12.2 __ 3 Feb 2004

12.8 __ 4 Feb 2004

13.4 __12 Mar 1957

14.1 __18 Mar 1990

14.6 __26 Mar 1777

14.8 __27 Mar 1777

15.1 __30 Mar 2017

15.6 __ 4 Apr 1946
16.0 __11 Apr 1869
16.1 __ 14 Apr 1869
16.3 __ 15 Apr 1945
17.0 __ 16 Apr 1945

17.6 __ 19 Apr 2018

19.7 __29 Apr 1775

20.0 __15 May 1833
20.4 __19 May 1868

21.0 __25 May 1953

21.2 __29 May 1780

22.3 __ 2 June 1947

23.0 __ 3 June 1947

24.6 __ 1 July 2015

24.7 __ 4 July 1976

 

25.2 __29 July 1948

 

24.9 __ 1 Aug 1995

24.6 __ 2 Aug 1995

24.4 __ 3 Aug 1990

23.9 __ 9 Aug 2003

23.6 __13 Aug 1911

23.0 __28 Aug 1942

22.6 __ 2 Sep 1906

22.4 __ 5 Sep 1949

21.4 __21 Sep 2006

20.2 __ 1 Oct 1985
19.8 __ 3 Oct 2011

19.0 __ 6 Oct 1921

18.5 __13 Oct 2018

17.2 __ 14 Oct 2017

16.9 __ 31 Oct 2014

15.4 __ 5 Nov 1938

14.6 __13 Nov 1938

14.4 __22 Nov 1947

13.1 __19 Dec 2015

12.0 __29 Dec 1987

11.1 __31 Dec 1859 (not valid, only appears due to calendar)

 

 RECORD MINIMUM

  

 (as there was a reading of -10.8 in December, the values in early January must be colder than that to qualify)

 -11.9 __ 20 Jan 1838

  

 -8.9 __25 Jan 1795

 -8.8 __ 9 Feb 1816

 -8.0 __15 Feb 1929

 -7.3 __16 Feb 1855

 -7.1 __17 Feb 1855

 -6.7 __24 Feb 1947

 -6.5 __13 Mar 1845

 -3.7 __14 Mar 1845

 -3.0 __16 Mar 1845

 -2.2 __17 Mar 1845

 -1.6 __21 Mar 1899

 -1.3 __25 Mar 1853

 -0.8 __31 Mar 1799

 -0.5 __ 3 Apr 1799

 -0.2 __19 Apr 1772

 0.5 __24 Apr 1908

 0.7 __29 Apr 1856

 2.6 __30 Apr 1945

 2.9 __ 8 May 1861

 3.6 __17 May 1935

 4.1 __18 May 1872

 4.6 __26 May 1821

 4.9 __30 May 1807

 6.4 __31 May 1802

 7.3 __19 June 1795

 8.7 __20 July 1836

 

(11.9 on 1 Aug 1888 is the highest value of the year)

 

 8.8 __26 Aug 1864

 7.1 __ 1 Sep 1816

 6.7 __13 Sep 1807

 6.5 __21 Sep 1872

 6.3 __22 Sep 1872

 6.0 __23 Sep 1773

 4.9 __28 Sep 1824

 3.6 __ 2 Oct 1817

 3.5 __ 7 Oct 1829

 3.3 __ 9 Oct 1852

 3.2 __12 Oct 1887

 2.2 __13 Oct 1838

 1.8 __16 Oct 1843

 1.5 __19 Oct 1813

 1.2 __21 Oct 1842

 0.9 __23 Oct 1859

 0.6 __24 Oct 1859

 0.3 __29 Oct 1895

-0.6 __ 7 Nov 1791

-1.2 __ 8 Nov 1812

-1.4 __12 Nov 1919

-2.1 __15 Nov 1965

-2.9 __16 Nov 1901

-4.2 __23 Nov 1858

-4.6 __24 Nov 1904

-4.7 __ 2 Dec 1796

-5.5 __ 6 Dec 1844

-5.7 __ 7 Dec 1879

-6.7 __11 Dec 1784

-8.5 __12 Dec 1981

-10.8 __25 Dec 1796

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C.E.T. daily records for the most recent interval (1940 to 2018)

An earlier section lists the all-time daily extremes for 1772 to 2018. But what about the more recent past? Many of the daily maxima were set in that recent era, but fewer of the minimum extremes, so this is the list of extremes that have fallen in the most recent interval defined as 1940 to 2018. Where a record is also the all-time record, the earlier mark is noted, in a few cases, that was earlier in the recent interval rather than before 1940 (rarely in the case of minima, occasionally for the maxima). Where a recent interval record max has not broken the previous mark, that continuing record high is shown in red italics. Only those few recent minima that are all-time records have a highlighted entry in the final column. For most of them, the previous all-time record is shown in regular type and the records broken recently are shown in blue italics, so it's easy to find the modern records). So to sum up, red italics means continuing maxima from before 1940, and blue italics are for minimum records that have fallen since 1940.

JANUARY

Date __ Record Max since 1940 __  previous mark _______ Record Min since 1940 __ previous mark

_01 ___ 9.8 (2012) _________ 10.8 (1851) ______ -4.9 (1962) _________ -5.9 (1820)

_02 ___10.4 (1948.) _________10.1 (1935) ______ -4.0 (1962) _________ -6.1 (1786)

_03 ___10.6 (1948.) _________11.6 (1932) ______ -3.5 (1941&1979) ____ -7.7 (1795)

_04 ___10.5 (1948.) _________10.3 (1932) ______ -3.4 (1971&2010) ____ -9.3 (1867)

_05 ___11.4 (1957) __________ 9.7 (1932) ______ -3.5 (1979) __________-6.5 (1789)

_06 ____9.8 (1999) _________ 10.3 (1898.)______ -3.0 (2009) _________ -6.9 (1894)

_07 ____9.3 (1949&1989) ____ 10.3 (1890) ______ -4.6 (2010) _________ -7.7 (1841)

_08 ____9.7 (1971) __________ 9.9 (1858.)______ -3.7 (2010) _________ -9.2 (1841)

_09 ____10.7 (1998) ________ 10.4 (1914) ______ -3.3 (1982) _________ -5.0 (1841)

_10 ____10.1 (1998) _________11.1 (1921) ______ -5.2 (1982) _________ -6.7 (1814)

_11 ____ 10.1 (1990) _________ 9.9 (1950)*______-5.0 (1987) _________ -5.5 (1838.)

_12 _____9.9 (1976&2007) ____ 9.6 (1818.) ______ -7.7 (1987) _________ -6.9 (1814)

_13 _____9.9 (2007) ________ 10.0 (1796&1873)__ -6.6 (1987) _________ -6.5 (1820)

_14 ____10.2 (2011) _________ 9.9 (1930) _______-7.6 (1982) _________ -7.1 (1881)

_15 _____9.3 (1968.) _______ 10.3 (1804) _______ -4.4 (1982) _________ -8.5 (1820)

_16 ____10.8 (1990) _________ 9.8 (1796) _______ -3.6 (1985) _________ -7.7 (1881)

_17 ____ 9.3 (2007) ________ 10.2 (1908.) _______ -5.6 (1940) _________ -6.2 (1881)

_18 ____ 9.5 (2008.)________ 10.0 (1828.) _______ -4.0 (1985) _________ -6.1 (1891)

_19 ____10.8 (2007) ________ 11.1 (1930) _______ -4.9 (1966) _________ -8.9 (1823)

_20 ____11.2 (2008.)________ 11.1 (1898.)_______ -5.7 (1940) _________-11.9 (1838.)

_21 ____10.3 (2002) ________ 10.8 (1796&1898.) __-7.1 (1940) _________ -8.1 (1881)

_22 ____10.2 (1969) ________ 10.3 (1878.) _______ -5.6 (1963) _________ -6.4 (1881)

_23 ____ 10.2 (1960) ________11.6 (1834) ________ -8.4 (1963) _________ -7.2 (1795)

_24 _____ 9.8 (2016&2018.) __11.4 (1782) ________ -8.2 (1963) _________ -6.0 (1881)

_25 ____11.6 (2016) ________ 11.4 (1846) ________ -5.2 (1945) _________ -8.9 (1795)

_26 _____ 9.3 (2003) ________ 10.0 (1834) ________ -7.6 (1945) _________-5.9 (1803)

_27 ____10.5 (2016) ________ 10.4 (2003)** _______ -5.6 (1945) _________ -6.5 (1776)

_28 _____ 9.8 (1944) _________ 9.5 (1843) ________ -4.3 (1979) _________ -6.3 (1776)

_29 ____ 10.2 (1953&1966) ___10.4 (1854) _________-6.4 (1947) _________ -6.8 (1776) 

_30 ____ 10.2 (2000) ________ 10.0 (1923) _________-5.1 (1947) _________ -7.5 (1776)

_31 ____ 10.3 (2000) ________ 10.9 (1868) _________-4.5 (1972) _________ -7.2 (1776)

_____________________________________________________________

* 11 Jan -- as the previous record also in recent interval, before that the maximum was 9.6 (1946), also after 1940, so finally the existing record before that was only 8.9 (1873). 

** 27 Jan -- as the previous record also in recent interval, before that the maximum was 10.1 (1867).

==================================================================

FEBRUARY

Date __ Record Max since 1940 ____  previous mark __________ Record Min since 1940 __ previous mark

_01 ______ 9.4 (1985) ________ 11.4 (1923) _________-6.8 (1956) _________ -5.9 (1776)

_02 _____ 10.9 (2002&2004) ___ 11.0 (1923) _________-6.5 (1956) _________ -5.9 (1830)

_03 _____ 12.2 (2004) ________ 10.3 (1869&1967) ___ -5.4 (1841&1956) ____ -5.4 (1841) 

_04 _____ 12.8 (2004) ________ 10.9 (1801) _________-3.0 (2012) _________ -5.0 (1912)

_05 _____ 11.8 (2004) ________ 11.1 (1933) _________-2.4 (1947) _________ -6.3 (1830)

_06 _____ 10.1 (1989&2011) ___ 10.3 (1866) _________-2.5 (1947) _________ -7.3 (1895)

_07 _____ 10.2 (1989) ________ 10.5 (1869) _________-4.7 (1991) _________ -7.2 (1895)

_08 ______ 9.5 (1948.)________ 11.4 (1903) _________-3.6 (1991) _________ -8.3 (1895)

_09 ______ 9.7 (1941) ________ 11.4 (1831) _________-3.8 (1991) _________ -8.8 (1816)

_10 ______ 9.1 (1998.)________ 12.0 (1899) _________-4.6 (1986) _________ -6.2 (1895)

_11 _____ 10.5 (1998.)________ 11.4 (1939) _________-4.2 (1986) _________ -3.8 (1784)

_12 _____ 11.4 (1998.)_________10.0 (1943)*________ -4.0 (1985) _________ -7.7 (1845)

_13 _____ 12.0 (1998.)________ 10.0 (1779) _________-4.1 (1985) _________ -7.0 (1929)

_14 _____ 10.1 (1998.)________ 10.2 (1794) _________-1.9 (1956,86,94) ____ -7.1 (1929)

_15 _____ 11.2 (1958.)________ 10.8 (1850) _________-3.4 (1979) _________ -8.0 (1929)

_16 ______ 9.7 (1998.)________ 10.0 (1928.)_________-3.4 (1969) _________ -7.3 (1855)

_17 _____ 10.3 (1950) ________ 10.7 (1878.)_________-3.1 (1947) _________ -7.1 (1855)

_18 _____ 11.7 (1945) ________ 11.1 (1911) _________-2.9 (1947) _________ -3.9 (1855)

_19 _____ 10.2 (1999) ________ 10.6 (1893) _________-2.2 (1985) _________ -5.0 (1777)

_20 _____ 11.3 (1990) ________ 10.7 (1903) _________-3.3 (1955) _________ -6.6 (1785)

_21 _____ 11.2 (2019) ________ 10.6 (1813) _________-4.3 (1986) _________ -4.7 (1810)

_22 _____ 10.7 (1953) _________ 9.8 (1897) _________-2.7 (1947) _________ -3.3 (1855)

_23 _____ 11.7 (2012) ________ 11.5 (1990)**________-3.5 (1947) _________ -2.1 (1785)

_24 _____ 10.9 (1990) ________ 11.4 (1846) _________-6.7 (1947) _________ -2.1 (1814)

_25 ______ 9.5 (2011) ________ 11.0 (1922) _________-5.1 (1947) _________ -2.8 (1814)

_26 _____ 10.3 (1945) ________ 11.2 (1882) _________-2.3 (1955) _________ -4.7 (1783)

_27 _____ 10.8 (1945) ________ 11.5 (1828.)_________-2.3 (1955) _________ -2.8 (1929)

_28 _____ 11.4 (1959) ________ 11.1 (1846&1912) ____-3.6 (2018) _________ -3.8 (1785)

_29 _____ 12.0 (1960) ________ 10.0 (1872) _________+0.4 (1944) _________ -2.4 (1904)

_________________________________________________________________________

* 12 Feb -- as the previous record also in the recent interval, 9.9 in 1792 was record maximum until 1943. 

** 23 Feb -- as the previous record also in the recent interval, 11.3 in 1846 was record maximum until 1990.

 

Edited by Roger J Smith
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MARCH

Date __ Record Max since 1940 __  previous mark _______ Record Min since 1940 __ previous mark

_01 ___ 10.3 (1960) _______ 10.7 (1878.)______ -3.8 (2018.)________ -3.5 (1785)

_02 ___10.7 (1999) _______ 11.1 (1777) ______ -3.2 (1965) ________ -2.1 (1804)

_03 ___ 10.2 (1952) _______ 11.0 (1777) ______ -3.2 (1965) ________ -2.5 (1947)*

_04 ____ 9.7 (1952) _______ 12.3 (1859) ______ -1.6 (1965) ________ -2.9 (1909) 

_05 ___ 10.3 (1989) _______ 10.9 (1834) ______ -1.0 (1947,70,71) ___ -2.8 (1786&1909)

_06 ___ 12.0 (1989) _______ 10.5 (1906) ______ -1.8 (1942) ________ -4.7 (1786)

_07 ___ 10.7 (2014) _______ 10.9 (1875) ______ -3.3 (1947) ________ -2.4 (1886)

_08 ___ 12.2 (2000) _______ 11.7 (1952)**______-1.2 (1947) ________ -3.1 (1786)

_09 ___ 12.4 (1948) _______ 12.2 (1826) ______ -1.7 (1958) ________ -3.0 (1917) 

_10 ___ 11.6 (1957) _______ 11.5 (1881) ______ -1.8 (1958) ________ -2.4 (1883)

_11 ___ 12.6 (1957) _______ 10.8 (1881) ______ -0.8 (1958) ________ -1.9 (1847)

_12 ___ 13.4 (1957) _______ 11.5 (1805) ______ +0.1 (2013) ________ -2.4 (1785)

_13 ___ 12.8 (1991) _______ 12.0 (1854) ______ +0.4 (1956) ________ -6.5 (1845) 

_14 ___ 11.1 (1961) _______ 11.5 (1805) ______ +0.7 (1962) ________ -3.7 (1845) 

_15 ___ 11.6 (1993) _______ 11.9 (1884) ______ -0.1 (1962) ________ -1.6 (1867) 

_16 ___ 13.2 (2004) _______ 12.9 (1884) ______ +0.3 (1979) _______ -3.0 (1845)

_17 ___ 13.2 (2005) _______ 12.9 (1990)***____ +0.7 (2018.) _______ -2.2 (1845) 

_18 ___ 14.1 (1990) _______ 11.5 (1892) ______ -1.1 (2018.) _______ -1.3 (1853)

_19 ___ 11.5 (2017) _______ 11.8 (1822) ______ +0.8 (1985) _______ -0.9 (1814) 

_20 ___ 10.9 (1992) _______ 12.3 (1779) ______ -0.5 (1985) _______ -1.6 (1845) 

_21 ___ 11.6 (2002) _______ 11.7 (1927&31) ___ +0.1 (1958) _______ -1.6 (1899) 

_22 ___ 11.3 (2005) _______ 12.6 (1903) ______ +0.3 (1958) _______ -0.9 (1837) 

_23 ___ 12.1 (1945) _______ 12.1 (1852&1945) _ +0.4 (2013) _______ -0.8 (1837&1899)

_24 ___ 12.5 (2005) _______ 13.4 (1776) ________0.0 (2013) _______ -0.6 (1879) 

_25 ___ 12.0 (1981) _______ 13.9 (1777) _______ +0.8 (2013) _______ -1.3 (1853)

_26 ___ 12.5 (2006) _______ 14.6 (1777) _______ +1.0 (2013) _______ -0.3 (1879&1901)

_27 ___ 12.2 (1989) _______ 14.8 (1777)._______ +0.9 (2013) _______ +0.1 (1901)

_28 ___ 12.6 (1998.)_______ 12..6 (1822&1998) __+0.4 (1952) _______ -0.3 (1785)

_29 ___ 13.3 (1968.)_______ 13.4 (1813) ________+0.6 (1952) _______ -0.7 (1785)

_30 ___ 15.1 (2017) _______ 13.4 (1920) ________ +1.3 (1952) ________ 0.0 (1799)

_31 ___ 13.4 (2017) _______ 13.8 (1815) ________ +1.0 (2013) _______ -0.8 (1799)

________________________________________________________

* 03 Mar -- as the previous record also in the recent interval, -2.0 in 1890 was record minimum until 1947.

**08 Mar -- as the previous record also in the recent interval, 11.5 in 1875 was record maximum until 1952.

***17 Mar -- as the previous record also in the recent interval, 12.3 in 1884 was record maximum until 1990.

======================================================================

APRIL


Date __ Record Max since 1940 __  previous mark _______ Record Min since 1940 __ previous mark
 

_01 ___ 13.3 (1995) _______ 13.0 (1815) _______ +1.9 (2013) _______ -0.2 (1917)

_02 ___ 13.3 (2011) _______ 13.9 (1835) _______ +1.1 (1968) _______ -0.5 (1917) 

_03 ___ 15.0 (1946) _______ 15.0 (1926&1946) __ +1.6 (1958) _______ -0.5 (1799) 

_04 ___ 15.6 (1946) _______ 14.3 (1926) _______ +2.4 (1966) _______ +1.0 (1809&1830) 

_05 ___ 12.8 (1999) _______ 13.3 (1857) _______ +2.4 (1975&1989) __ +0.4 (1911) 

_06 ___ 15.1 (2011) _______ 13.2 (1827) _______ +1.7 (2008) _______ +0.8 (1911) 

_07 ___ 12.0 (2011) _______ 14.7 (1859) _______ +1.8 (1986) _______ +1.0 (1839) 

_08 ___ 11.6 (1969) _______ 12.5 (1798) _______ +2.8 (1970) _______ +2.4 (1780)

_09 ___ 13.7 (2017) _______ 13.5 (1778) _______ +1.7 (1973) _______ +1.4 (1812)

_10 ___ 12.8 (1981) _______ 13.5 (1928) _______ +1.9 (1978) _______ +0.5 (1837) 

_11 ___ 14.6 (1981) _______ 16.0 (1869) _______ +1.3 (1978) _______ +1.5 (1837)

_12 ___ 14.2 (1991) _______ 14.4 (1939) _______ +3.8 (1998) _______ +1.1 (1879) 

_13 ___ 14.0 (1967) _______ 14.6 (1792) _______ +3.2 (1978) _______ +1.1 (1816) 

_14 ___ 15.3 (2007) _______ 16.1 (1869) _______ +0.5 (1966) _______ +0.6 (1816)

_15 ___ 16.3 (1945) _______ 15.8 (1779) _______ +1.4 (1966) _______ +1.5 (1892)

_16 ___ 17.0 (1945) _______ 13.8 (1865) _______ +2.7 (1966) _______ +2.0 (1892)

_17 ___ 14.8 (2003) _______ 14.9 (1865) _______ +3.6 (1966) _______ +2.1 (1793&1812) 

_18 ___ 17.0 (2018.) _______ 14.5 (1945)*______ +3.9 (1983) _______ +1.7 (1807)

_19 ___ 17.6 (2018.)_______ 15.4 (1870) _______ +3.5 (1995) _______ -0.2 (1772) 

_20 ___ 14.8 (1945) _______ 16.6 (1893) _______ +3.4 (1991) _______ +2.3 (1849)

_21 ___ 15.5 (1968) _______ 16.1 (1893) _______ +4.7 (1991) _______ +2.4 (1936)

_22 ___ 15.4 (2011) _______ 14.3 (1778.)_______ +5.9 (1967&1981) __ +3.4 (1778.) 

_23 ___ 15.8 (2011) _______ 15.9 (1874) _______ +3.4 (1981) _______ +2.6 (1908.) 

_24 ___ 15.3 (2007) _______ 14.8 (1901) _______ +3.1 (1981) _______ +0.5 (1908.)

_25 ___ 14.6 (2007) _______ 15.9 (1821) _______ +3.2 (1950) _______ +1.8 (1908.)

_26 ___ 14.5 (1975) _______ 16.1 (1928.)_______ +3.3 (1981) _______ +3.8 (1857&1906)

_27 ___ 14.2 (1994) _______ 16.5 (1866) _______ +4.5 (2016) _______ +2.7 (1919)

_28 ___ 15.5 (1994) _______ 16.9 (1775) _______ +3.7 (1941) _______ +3.0 (1826)

_29 ___ 15.2 (1987) _______ 19.7 (1775) _______ +4.2 (1945) _______ +0.7 (1856)

_30 ___ 14.5 (1958&2005) __ 17.4 (1775) _______ +2.6 (1945) _______ +3.7 (1876)

_______________________________________________________

* 18 Apr -- as the previous record also in the recent interval, 13.7 in 1783 was record maximum until 1945.

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