Why is my floor wet every time it rain passenger side front only front

Had same problem with my 2006 Commander. Over 2" water! Lift floor rug and padding. Find small hole where hose is suppose to go throu. Mine was broken and hose was not staying in chasing hole so water poured in. U can do this yourself .(I'm female and blonde)... just add a short piece of flexible hose to end of original hose, stick into hole, put some silicone to hold hose in place. I kept my rug and padding up until everything was thoroughly dried. No leak any more.

hole in floorboard or bad window seals---that or ac unit leaking--but you said only when it rains??