If I can, I'll take a bus or find a ride if it's raining and I don't need to be anywhere at times people aren't going places (ie. staying out past 5 pmish). But most of the time I bring a poncho and wait for the weaker spells, and ride slowly with lots of lights and a yellow safety vest. The worst weather I was in was late at night during a tornado watch. When it got really nasty, I went inside walmart, got some apple soda and the ny times, and waited it out for about 45 minutes or so. Riding in the rain is always an interesting experience.