I have a better idea. Keep the windows up and don't run the air conditioning.

1. Wear a bathing suit (and a change of clothing if necessary)
2. Bring along an ice chest full of ice.

If you get too hot, put your face in the chest. Drink the ice water and put your hands in it.
Basically find other ways to keep cool.

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"Extremes to the right and left of any political dispute are always wrong."
—Dwight D. Eisenhower