Vancouver average temperature may
The average temperature for May in Vancouver is 12 degrees C. 1  Hottest Temps: The average daytime high is 16 C. 2  Coolest Temps: The average nighttime low for the month of May is 8 C.2 mm. On average, there are about 12 rain days in Vancouver for the month of May (but for most of those, the amount is only about 3 or 4 mm). Precipitation is usually in the form of rain, although it can still snow in the higher elevations of North & West Vancouver in May.