Cooler nights in September mean less reliance on air conditioning.
Air conditioning cools our interiors, but can heat up the outside temperature by 1 - 1.5 degrees in cities.
Opening windows in the early morning to let in the cool night air can quickly reduce indoor temperatures by several degrees, especially if you can create a cross breeze. Just remember to close them again before the day starts to heat up.
Raising the temperature of your air conditioner by even half a degree also helps save energy.
If we each save a little, we all save a lot.
