June, July, August and September are your best bets for staying dry in the Pacific Northwest. October and November can get pretty wet and windy, but still have breaks of beautiful weather with lovely fall colors bursting out everywhere. December through February are likely gray and wet near the coast with some higher elevations often snowed in and inaccessible to traffic. March through May can be a tossup – might get snow, might get sun, might get rain. Even rainy it’s beautiful up here, and with the right gear and your comfy, warm dry campervan, any time is magical.