Normal annual rainfall here at my west side home at 3,800' is around 12" / less than 10" east of town. There are insane differences 30 miles west in the mountains where 70" or more fall (mostly as snow) The coast ranges get up to 200" of rain per year which is where the "PNW is so wet" reputation comes from? Yes, parts of the state can be extremely wet but most of OR consists of dry sunny high desert plateaus. Had first measurable rain since June 20th yesterday, a whopping .03 in the bucket. LOL.
Strangely the mountains are still mostly snowless, my other years here there have been September snows on the summits. I think it snowed above 8000' last night but mountains are hidden in clouds this morning so cannot tell yet?
Photo of glacier fields from a hike I took on September 20th.