After living here over a year and watching weather patterns, I began to question that. I have also discovered that far northern California IS included in the PNW by some definitions. In fact, Crescent City is so close to Oregon that our phone book combines CC and Brookings, Oregon. So I rest my case...Purists say no, new thinking says Yes.
PNW as defined by the Old Farmer's Almanac:
I wish this was bigger so you could read it
It's been doing this on and off for days: