Most other countries might have more extreme weather but it’s much easier to plan for so it doesn’t feel nearly as bad. In London, planning for the weather is somewhat a fool’s errand. I remember one April many years ago where there was thick snow at the start of the month and glorious sunbathing weather 2 weeks later.
https://www.reddit.com/r/visitlondon/comments/1d4k78d/how_bad_is_london_weather_really/