1. A car windshield transmits heat as Earth’s atmosphere does, so a car in the sun is like the greenhouse effect, letting radiation in and trapping heat.
2. A wet car at night means the temperature has started falling to the dew point, when invisible H20 vapor becomes visible dew, illustrating the process of condensation.
3. A car becomes especially dirty during High pressure weeks when the air sinks, compressing dust and particulates.
4. If your car is very wet in the morning and there are no clouds, it means the day will be warm or hot and dry, because High pressure pushed down atmospheric moisture (both humidity and dew) during the night; so drink water to combat the dryness, and avoid morning aerobics or particulates will go in your lungs.
5. When dew disappears off your car windshield, it’s evaporating into “humidity,” and latent heat is absorbed in invisible water vapor.
6. In freeway corridors, fast trucks displace air which creates lower pressure behind them, so (relatively higher pressure) air rushes in to fill the spaces. If there are sound walls such as Harbor Freeway, a lot of gusts blow your car around in the lane.