North Dakota can have extremely hot days and then nights when it stays quite warm. I sometimes saw nighttime lows in the upper 70's. I had a whole-house exhaust fan that I turned on at night, once the outside temp was cooler than the indoor temp. If you live in a hot climate, ventilating your garage and charging at night certainly seems like a good idea. Here in Spokane it's not an issue. Though I do charge at night just to be nice to the grid.