Hmm. I don't agree with the OP. I like riding, camping, and even at times hiking, in the rain. It's cooler, there's less traffic, and it gives you toughness points over other cyclists. :-)
After descending Pole Steeple, a rock formation on Piney Mountain in PA, during a hailstorm.
Fort Washington, PA, December 23, 2007.
I draw the line at riding in a thunderstorm, however. Neilfein and I were caught in one on the high point of the GAP in June 2008. We rode it out in an underpass at the high point.