Quote:
Originally Posted by Old Mechanic
Bottom line is, without humidity there is no supply of water to freeze.
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The OP is in California's Central Valley, not the southeast. There generally isn't a whole lot of moisture in the air there - in the hotter parts of the day, it can average under 30% RH:
https://www.currentresults.com/Weath...idity-july.php
Humidity inside the car could easily be higher, due to breathing, sweat, dogs panting, &c.