As the sun rises due east and sets due west, the shade line over south facing windows at noon is slowly rising to allow the sun to begin to gradually warm the home.

Night time temperatures have dropped below 65 degrees nation wide making it the perfect time for passive cooling. Open your windows at night to cool down the house, then close them in the morning to hold in the cool air. With a well-insulated home and at least some thermal mass, the home should remain relatively cool the rest of the day even if the afternoon temperatures soar.