when moisture in the air settles on a cooler surface. Inside a vehicle, warm and humid cabin air can come into contact with cold windows, causing tiny droplets to appear across the glass.
The moisture may enter the car in several ordinary ways. Wet shoes, damp clothing, rain-covered umbrellas, snow, and water carried inside on floor mats can all add humidity to the cabin.
Even normal breathing releases moisture into the air. When several people sit inside a closed vehicle, especially during colder weather, the amount of humidity can rise
