看这个

The wetter season lasts 6.4 months, from October 9 to April 22, with a greater than 35% chance of a given day being a wet day. The month with the most wet days in Vancouver is November, with an average of 17.4 days with at least 1 millimetre of precipitation.

不过下雨确实干净；下雪的时候很漂亮，但是撒盐车汽车一上路就“埋汰”极了