When i go on my 3 month 'summer' tours I usually start in late May and finish in late August. My experience with the northwest is that its' 'rainy' or snowy (in the Mts) season does not reliably end until late June. Till then be ready for those storms. Of course its all that rain and snow that makes the mountains so beautiful. Mckenzie Pass in the cascades is often snowbound well into June, though I have always had luck crossing over it.
In Europe's alpine region, i usually start in the French alps in late May and zig zag my way eastward, ending in Austria in August. Again: the french alps/June can be damn cold and snowy on those alpine passes; and alot of fog as well.
roughstuff
roughstuff