Even on 90+ days? Even with my sun shade in the windshield my car gets insanely hot inside if I don't keep the windows cracked when parked. But that might be partially due to having black on black paint and interior.
Why does it matter if it gets hot inside when nobody's in it?
Well, here in Sweden, hot-hot days are far & few between, BUT during my six years in Saudi Arabia nobody would ever leave their windows open.. (Just as they would never wear shorts, even when 47- 50 C in the shade, but that's another subject..)
I do it just to avoid any possible cracking / damage to plastics from excessive heat, not for comfort when I get in. Trying to avoid having a 140 degree oven baking everything inside. Maybe I'm worried about nothing in terms of damage but just something I've always done.
Thatās a thing in cars? I wonder why all the people who leave their windows closed donāt have a cracked dash.
Definitely a thing in hot climates, yes. Sun and heat are brutal on plastics. Just do a search for cracked dashboard. Used to be more common I'll admit but anytime you're exposing plastics to extreme swings in temp the expansion and contraction will eventually effect them making them more brittle. I guess I just like to take preemptive measures to care of the interior of my car as much as the exterior.
