Truck Wont Idle

Weird thing happened today, drove my truck at lunch and everything was cool. Sat at the house for a while, it rained like a biotch for an hour or so, went to drive the truck again and it wont idle worth a crap. Ive checked distributor cap/rotor, wires, etc for wetness and everythings cool. Any ideas? Its got a weber carb on it dont know if it makes a difference. Never had this problem before. Any help is greatly appreciated since this is my daily.