1995 Subaru Impreza Moisture puddle under right front tire

Each evening for the past three nights, after driving home from the bus station (about six miles' drive), within about 15 minutes is a puddle collected under the right front tire. It appears to be water (no smell, no slipperiness, no color). After about an hour, it disappears and leaves no stain, either on the driveway or paper towels placed to better catch the "leak". One of the nights, the air conditioner was in use, so we figured it was condensation (it's been warm). However, the other two nights, the air conditioner wasn't in use. We haven't verified if the puddle happens in the morning as the car is left at the transit center and unchecked until the end of the day.

Before we take it in for a professional look-see, do you care to take a stab at guessing a potential culprit for this?

Thank you very much!