The Pacific Northwest is like this a lot in the summer. I'm from Texas and have never spent time there in the fall or winter, but I don't think it's that terrible.
Nowadays, here it goes from hot sticky summer to too cold then back to hot and sticky then back to cold all in one week. Gone are the days of opening the windows.
Winter = yay cute jackets and scarves, but oh no, I live in Australia and work from home and rarely go outside, so there are about three days where I do venture out and it's cold enough to wear my cute winter clothes.
On the coldest nights, I keep warm by thinking "at least it's not summer".