Judging by the weather I experienced there last week, you just need to invest in a good rain suit. I left Seatac around noon Sunday, spent the next 3.5 days bouncing back and forth between Seattle, West Seattle, Bremerton, Port Orchard, Tacoma and Renton. It was never warm enough (to my Southern blood) to think a rainsuit might have been a bit uncomfortable, especially with the lack of humidity. But since it rained every effin' day I was there, at least 5 times and usually for only about 5 or 10 minutes each time, looks to me like you either deal with it or give up riding - so deal with it 