How cold does the PNW get?

I have a pair of these: FACTORY SECONDS: Nashbar Mansfield 2 Chamois Tights

I use them for down into the upper 30's in Michigan, when there isn't snow on the trails in the fall/winter/spring. Also took them on a tour, and wore them into the high 50's/low 60's in a drizzling rain for three days. Never had an issue with my legs getting cold or being too warm in those ranges.