What a brilliant month this was. The first two weeks were exceptionally cold for the time of year. Temperatures well below freezing and struggling to top 10C, not to mention the record breaking amount of sunshine. The sunniest April on record, you wouldn't expect it to be so cold given past sunny April's have all been mild to warm (2007,11,20). I can recall snow falling on the 10th, temperatures that day didn't exceed 5C. The second half was exceptionally sunny, virtually every day had clear skies.
April 2021 saw the lowest min CET on record at 1.2C, in context January 2013 was also 1.2C. For here, the month saw a min average of 0.5C.. that's colder than Jan 2021. Feb 2018 was just 0.1C colder. Dec 2022 was 0.2C colder.
It had a record amount of frosts beating most winter months. This all happened after the very warm end to March, temperatures didn't recover until the end of May. Most people I talk to think of April 2021 fondly, yes it was exceptionally cold but the sunshine made up for it.
Personally, it's one of my favourite spring months given the freakish nature to it all and exceptional cold.. something we hardly see these days.