average temperature in vancouver in 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.he month of May average rainfall in Vancouver is. 62 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).