Washington is split on the Cascade mountain range. Western Washington gets more rain fall. Because of our unique geography we have micro climates. So what is true for one may not necessarily be true for all areas. Then we have the convergence zone which can bring wild and unique weather at any given point in time. When it snows in western Washington lowlands everything will pretty much shut down after about 1/2".

Right now outside my window it is sunny and beautiful. Temps are in the 70s.