Best Thermostat Settings for Houston Summers — Save Money Without Sacrificing Comfort

The classic advice is 'set it and forget it at 78°F.' That's a fine starting point, but Houston's humidity changes the equation. Here's how to dial in your thermostat for real comfort and real savings.

The 78° Baseline

The Department of Energy recommends 78°F when you're home. For every degree below that, you add roughly 6–8% to your cooling costs. In Houston, where cooling can be 50%+ of your bill, those percentages add up fast.

Away & Asleep Setbacks

• When away: set back to 85°F.
• At night: 74–76°F works for most homes, especially with ceiling fans.
• Never turn the AC fully off during the day — your system will run constantly to remove humidity when you return.

Humidity Is the Real Enemy

At 45% indoor humidity, 78°F feels comfortable. At 65% humidity, it feels sticky and warm. A variable-speed system or a whole-home dehumidifier lets you feel cool at a higher (cheaper) setpoint. This is why many Houston homeowners upgrade to high-efficiency, variable-speed equipment.

Want help right-sizing your comfort strategy? Schedule a comfort consultation with Bayou City Heating & Air.