Although we’d like to keep the weather outside, there are some instances you should open your window. After dark, open multiple windows. This step will create a cross breeze that will lower your home’s temperature, even if the outside temp reads higher. During the day, keep all of your blinds closed, especially if they’re facing the sun. This step will prevent any unnecessary heat from seeping in. If someone is dying for sunlight, let them have their blinds up but keep their door closed, so the temperature stays contained.