1994 Ford Aspire want run when its damp

Engine Mechanical problem
1994 Ford Aspire 4 cyl Two Wheel Drive Automatic 115oo miles

i have a problem with my car when it rains an weather is wet an damp my car want start. What could be wrong with it after it drys out it will start ok. Could the wires get moister build up on them?What can I do to fix this problem?Thank you n frazee