So this has been a recurring problem for the past few weeks. If I drive in the rain the car will not either die while driving, or if I am lucky enough to make it home, will not restart for a day or two (I am assuming that something is drying out enough to allow it to start). Now today, it will not start after just sitting out in a light rain this morning. The starter is turning because I can see the serpentine belt is turning, and trying to push start it dosn't work either.

So is there anything else I should check before I push it into the garage to replace the crankshaft sensor, which was suggested here?

 

Your ECU is probably getting wet.
On a dry day, hood closed, use the garden hose and run water over the hood and fender, start with the passenger side, soak it for 5-10 min and then try to start it, if it wont start then water is most likely getting into the ECU and once it drys out its fine.

 

It is in the big plastic box on passenger fender back near the wiper fluid jug.