I can't imagine these are very popular in Arizona, but in the PNW the sun isn't a big problem for 10 months out of the year.
Barring that, 80%+ of the people in the PNW live near the coast.
If you want the worst of both worlds with that kind of oppressive heat 24/7 and high humidity, take a look at Houston.
PNW isn't anywhere close to that.
As for number of 100+ degree days, it's more elusive, but the mean max is over 100 for two months on the Wikipedia page https://en.wikipedia.org/wiki/Kennewick%2C_Washington?wprov=...