May in Vancouver averages a daily high of 17.7°C with nights around 10.1°C. Expect roughly 10.9 wet days totalling 72.1mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Vancouver is July–August.
Based on VANCOUVER HARBOUR CS, BC CA (5.6km), 1995–2024. 25 years of May data.