I don't care for riding in inclement weather either but it's well worth it for the roads we find and all of the nifty little towns along those old mountain highways.
We used to do an annual trip on the Vins to Grass Valley CA. Four or five of us would ride the Pacific Coast highway down then quiet old 2 lane highways home, about 3000 miles return.
Always had 1 or 2 days of heavy rain out of nine or ten travel days. The roads and the scenery are breathtaking. If limited to riding in only perfect weather, you would never get to do a trip like that.
This is a typical trip, Vancouver to Yellowstone to ride the 11,000 ft high Beartooth and all the great roads in between. About 2,000 kms ea way. You will hit rain!
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Glen