When I think about it, I just google 'weather <zip code>' and just use the nice little graphic that Google puts above all the links. Very clean and simple.
But because I never think about it, I'm experimenting with using IFTTT.com to send me an email whenever rain is in tomorrow's forecast. So far I've gotten 1.
http://www.bikeforums.net/commuting/...in-alerts.html