A very warm first half. I spent the first third of the month on the Isle of Arran, with some very warm, sunny and summerlike weather during the first week, but the second week was somewhat more cloudy.
A funny 'quirk' on the 10th- while I travelled from Arran to Leeds and then Tyneside, it was dull everywhere apart from a 10-mile radius around Lancaster (!!) where it was very sunny.
The second half of the month didn't contain any particularly memorable events in Leeds (where I went to university after midmonth) but it was consistently sunny and generally warm.
The month averaged 60% on my ranking system, and was the third September in a row to make a sixties score- by contrast, most Septembers of the 1990s 'achieved' forties scores.
I doubt October will achieve anywhere near that kind of score though!
Statistics from 17-30 September in Cleadon, Tyne & Wear:
Mean Max 17.6C
Mean Min 9.0C
Mean SLP 1006mb
Total precipitation 6mm
Highest max: 21.1C (22nd)
Lowest min: 3.6C (24th)