Seeins it'* the front and rear, I'm gonna still vote for door seals. That'* the only thing I can think of that would leak from rain while sitting still.
To try a test (it'* how I found my leak), pay the extra 5 to 7 bucks next time you get gas and run it through the touchless car wash. The high pressure water should definitely find and pointout any weak spots on your sels.
As to Will'* core suggestion, if the core is dirty/clogged it doesn't drain correctly, thus leaking into the cabin. Once clean, it will drain properly, to the outside of the car
1998 SE Midnight Blue Pearl
Gutted airbox, FRAM AirHog, removed MAF Screen, eBay clear corners, extended brake lights
I'm so much cooler online