Here in vancouver were at the 23rd consecutive day of rain and counting. The record set in the 50's was 28 days.

I spend over 1 hour each way in it. So to me waterproofness is important. Water resistant windproof jackets i also have, and prefer for anything up to about 30 min of rain. After 30 min of rain, I want waterproof When its in the 30's and low 40's its freaking cold if you get soaked.

Ventilation becomes key with waterproof layers. Both in the ability of the material to let some air/vapor thru and the amount of active venting thru zips etc.
Pearl Izumi makes a trifecta jacket. Costs hundreds of dollars, is made from the same eVent material, and they dont put in a single vent. That would be a sauna, anywhere.