According to AW, it only got to 15C, not 25C. https://www.accuweather.com/en/ca/vancouver/v6c/may-weather/53286
https://www.accuweather.com/en/ca/vancouver/v6c/april-weather/53286?year=2026 At least April had 17 days that were 15C or better and only 3 of them were at least 20C.
That's because today is fall weather day in May for Vancouver. There might only be 15 days this May that were at least 20C in Vancouver. Only 3 days that were at least 25C. Then that's it, from the start of June to the end of August are the 3 fastest months in Vancouver. Usually, the crappie rainy weather will try to reduce some of the dry summer days. While the 1st week in September might still look and feel like summer, usually, 10-15 days into the month your lucky just to have spring like weather. Then next thing you know, its October with cold, but not frosty nights. Then from November to March is the real cold, damp and ugly weather. Not much better in Seattle, no wonder Grunge Music got its start there.