I hate it when people tell me, "Fishing is better in the rain." No it's not. If the water level is low and clear, and a light rain starts, it may be good for a few minutes.
Go anyways. Just getting out of the house for the weekend is a vacation in itself. You can fish muddy water, but not if it's flowing to fast. Try hitting a lake around that area until conditions are more favorable to you or fish slower water.