5. Get dark shades
Your white curtains may look great, but they’re doing nothing to keep the sun from baking your living room all day long. Instead, invest in dark colored curtains to black out your room during the hottest part of the day, and whenever you’re not at home.
6. Keep your windows open at night On less-hot evenings, brave it without AC and keep your windows open with a fan blowing in air from outside. When you wake up in the morning, shut them and draw them blinds. This will essentially capture the cooler air indoors.
7. Try to use your oven at night It may seem obvious, but don’t use your oven when it’s hot. You’re basically pouring money down the drain to have a box of heat sitting in a house you’re trying to keep cool. You should also limit your use of heat-producing appliances like dishwashers and dryers to nighttime.