The temperature in northern Okanogan County can still get pretty warm in the summer (90's) but it doesn't last as long as farther south. Quite a bit of snow in the winter and it stays around awhile as the temp stays low for a long time.
This area is absolutely gorgeous, but also very remote with not much city life around for miles... which is not necessarily a bad thing.
I don't have any information about the schools.
Though not specifically that area, I have some
photos of other North Central Washington areas here.