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Windows down in Cali versus Florida is completely different for driving. In Florida it’s a lot harder to drive with windows down because then you let all the humidity into the car. In west coast areas, it’s so much nicer to go with windows cracked or down since it’s still dry air outside
The ac in my Ioniq is extremely efficient. The temperature increase outside offsets any mpg loss my ac gives. So say I have windows cracked at 75 degrees outside, then it goes to 90 degrees outside and I put my ac on, my mpg stays the exact same, if not slightly improves actually. Mpg boost for hotter temps in my car is greater than the ac loss with my car and tinted windows. I’m sure I could get amazing mpg driving around Phoenix when it’s 115 outside and leaving the ac off, but I don’t want a heat stroke in the name of hypermiling
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