after a rainy night or just a day or 2 of damp weather my 96 s-10 blazer wont start. whats a dude to do ?

 

I would see if its getting fuel by spraying carb cleaner into throttle body while staring it if it fires it tells you if its not getting fuel.
If still dont work could be cap has humidity on inside or spark plug wires wont fire if they are bad. let us know how it goes.