Hell, I'll vouch for Washington. Seattle area towards Issaquah gets pretty chilly, but the summers are decent. There are definitely distinct cold/warm seasons.
If you want the best of warm and cold in the same day, you can live in southern California. Go up to Big Bear and ski and stuff, and then drive for a couple hours and be chillin' at the beach in 80 degree weather.
Issaquah County, Washington.
Issaquah isn't a county, it's a city in King County.