https://www.vancouverisawesome.com/local-news/metro-vancouver-weather-summer-june-2026-12441747
June, July & August are the fastest 3 months in Vancouver, because they are usually the best weather months. However, there is never any guarantee of 90 days of nice summer weather.
https://www.vancouverisawesome.com/local-news/metro-vancouver-weather-heat-rain-june-2026-12455681
Unfortunately, May can sometimes still look more like fall than spring. However, what really should be the summer months can still occasionally have cool, cloudy and rainy days. Then by the second week of September, there is a sense that summer is fading quickly. The later half of September is more like spring than summer, with October having some occasionally spring-like days, but colder nights.
November is totally crappy cold & damp weather, with the depressing 3 months of winter still to get through. March is usually more like fall than spring, but at least you are out of February and getting out of another winter.
Somehow, the 3 depressing, cold and damp wither months seem to always drag along, while summertime in Vancouver always runs out too quickly.