The best thermostat schedule for a Florida home uses 78°F while you're home and awake, 80–82°F when the house is empty, and 76–77°F for sleeping — modest setbacks rather than dramatic ones, because South Florida's humidity punishes big temperature swings. In drier states, homeowners can let the house drift 10 or 15 degrees while at work and still recover quickly when they walk in. In Miami-Dade and Broward, where outdoor humidity regularly sits above 70%, a wide setback lets moisture soak into furniture, drywall, and carpet, and your system then has to run hard just to pull that humidity back out once you're home. A modest, consistent schedule keeps your FPL bill lower without turning the recovery period into a muggy, uncomfortable slog.
Keep 78°F as your baseline 'home' setting — it's the temperature that balances comfort and cost for most South Florida households, and it lines up with the guidance in our best AC temperature guide for Florida. Every degree you push below 78 adds measurably to your cooling costs, since your system runs longer to fight both the outdoor heat and the humidity load. If 78°F feels warm at first, give it a week — most people acclimate, especially with ceiling fans running to move air across the skin.
For the 'away' period, 80–82°F is the safe range — cool enough that humidity stays under control, but warm enough to meaningfully cut runtime while nobody's home. This is different from the outdated advice of shutting the AC off completely during the day. In a humid climate, an AC system does two jobs at once: cooling the air and pulling moisture out of it. Turn the system off for eight hours and the humidity in your home climbs uninterrupted, which is exactly the setup that leads to musty odors, foggy windows, and in the worst cases, mold growth behind furniture or inside closets.
Drop to 76–77°F about 30–60 minutes before bed — cool enough for good sleep without the deep energy cost of running the low 70s all night. South Florida nights rarely dip below the mid-70s outdoors even in winter, so your system is working against a warm exterior no matter what. A slightly higher sleeping setpoint paired with a ceiling fan on low usually feels just as comfortable as a colder room, since moving air makes a bigger comfort difference than a degree or two on the thermostat.
A smart or programmable thermostat is what actually makes this schedule work without you thinking about it. Manually adjusting the temperature four times a day is unrealistic for most families, but a scheduled thermostat — or one with geofencing that detects when your phone leaves the house — handles the home, away, and sleep transitions automatically. Many models also let you set a humidity ceiling, so the system will run even during 'away' mode if indoor humidity climbs past a set percentage, which protects your home even if the setback temperature alone wouldn't have triggered a cycle.
Never set the 'away' temperature above 82°F, and never shut the system off entirely, even for a week-long trip. It's tempting to think a higher setback saves more money, but in South Florida the math works against you past a certain point. Once indoor humidity climbs unchecked, your AC has to run continuously on your first day back just to re-dry the house, which can cost more in electricity than a moderate setback would have used the whole time you were gone — and it puts your home at real risk for mold growth in a climate this humid.
Pair a smart schedule with the basics that make any AC system run efficiently — a clean filter, a clear condensate drain, and a system that's properly sized for your home. If your FPL bill still feels high even with good scheduling habits, the issue may not be your thermostat at all; see our guide on lowering your summer FPL bill for other places energy tends to leak out of Florida homes, from duct leaks to an aging outdoor unit working harder than it should.
MGM A/C Appliances helps homeowners across Miami-Dade and Broward — from Coral Gables to Hollywood — dial in a thermostat schedule and AC system that actually delivers on the savings. We're a family-owned, licensed and insured company offering free estimates and 24/7 emergency service with no after-hours surcharge. Call us at (786) 352-0084 to talk through your home's setup or schedule a maintenance visit.