If you need to dry out the inside of your car (I did this when it drizzled in my convertible) I closed all the windows and just circulated AC for like 15 minutes.

AC will remove moisture from the air so it should do a decent job of helping keep dry

 

Check the rubber gromets in the floor board of the car. One of them might have come out.

 

whoa....Check out my thread from a ways back...you have an MR with the factory gauge pack?

https://www.evolutionm.net/forums/sh...t=MR+leaks+bad

 

JRalli,
I would also check the HVAC evaporator fan. This same thing has happened to me recently, The car would be seating during the rain, and water would damp the front passenger carpet, but I never found the leak. Yesterday I was washing the car, and I noticed water drops coming from the evaporator fan.
Should I find the cause, I'll let you know

 

it may seem it's cominf from behind the heater assembly. that's where the hose/s were run thru on my car. The water trickled from behind that assembly. It may seem like it's coming from the heater, but really coming from up behind it.

 

try the seals under the driver and passenger side under dash on the right side if the inner fender there like 3in oval seals. mine popped out and when it rained I had like 1in of water in the back floorboard
check those out

 

^^yup. That's where mine was leaking b/c of them running wires thru and not sealing them back up.