Should be a evaporator drain tube exiting the cab at the base of the firewall on the passenger side. Should be able to see it when ya look under it from the passenger side, black rubber hose.
Possible it disconnected from the evap box inside , have to pull the carpet back to check that.

 

I had the same exact problem on my 2010 many years ago. Turned out to be the drain hose was clogged with something. Cleared it out and has been fine ever since. Make sure you dry everything out. I had to remove the passenger seat and carpeting/insulation panels and left them out in the sun to dry.

 

Problem solved. I pulled the drain line and it was clear. I shot compressed air backwards into the unit itself and 2 quarts of water came gushing out. Now all is good! Thank you for the help

 

seemed to me it was wet in the same place in my 2012 but when it rained. Glove compartment contents wet floor wet and I ended up recently needing to replace the brake light relay located behind the glove box bc it was flooded with h20? Super weird issue to have in an otherwise great car.
My AC has nothing to do with it but it is an ongoing thing - Im guess I am glad it doesn't rain much here until Dec.

 

Sounds like a leak in the cowl. Any leaves or stuff in there? Try a local body shop maybe?