Everytime I've ridden the Solvang double I've gotten rained on, hailed on, tornado'd on and every other kind of weathered on.

Look on the bright side there is only a 60% change of rain on Saturday and right now it isn't supposed to start until after 6pm. If you are lucky it'll hold off till Sunday. Solvang is a really easy and fast course. There is generally a lot of people who ride it so there is plenty of opportunity to ride in groups. I know people who finish in less than 9hrs. if you ride faster there is a better chance you'll outrun the rain.