In the summertime, we do similar things to keep our house cool, since we don’t have air conditioning. We have two thermometers outside, and two thermometers inside.

During the morning, we wait until the temperature outside gets as warm as inside, and then shut the windows, and draw the southern curtains to keep out the sun. During the evening, we reverse the process — we watch the temperature until it gets cooler outside than inside, and then open up the windows and doors. When it gets really hot, we use fans to help flush out the hot air. Fortunately, it gets cool enough in Colorado that it always gets cooler than the house at night!