When a Georgia afternoon is pushing into the 90s and the humidity is high, the best thermostat settings for summer are not always about choosing the lowest number. A thermostat set too low can drive up your power bill, run your system longer than necessary, and still leave parts of the house feeling damp or uncomfortable. The right setting keeps your family comfortable while giving your air conditioner a reasonable workload.
For most homes, 78°F is a practical starting point when people are home and awake. From there, make small adjustments based on your comfort, humidity level, insulation, and the condition of your HVAC system. A well-maintained system should cool your home steadily without needing to run all day just to reach an unusually low temperature.
Best Thermostat Settings for Summer at Home
The U.S. Department of Energy commonly recommends 78°F for cooling when a home is occupied. That number works well for many Georgia households because it balances comfort with energy use. It may feel warmer than the setting you are used to, especially if you normally keep the thermostat near 72°F, but ceiling fans and controlled humidity can make a major difference.
If 78°F is not comfortable for your household, try 77°F for several days before lowering it further. Each degree below your normal setting can increase cooling costs, particularly during long stretches of hot, humid weather. The goal is not to tolerate an uncomfortable home. It is to avoid making the AC work harder than it needs to.
Your ideal setting may also depend on where you spend time in the house. An upstairs bedroom, a sunny living room, and a shaded basement do not gain heat at the same rate. Before dropping the thermostat for the entire home, check whether closed vents, poor airflow, leaky windows, or a struggling system are causing one room to feel warmer than the rest.
A comfortable daytime setting
For most occupied homes, start at 78°F. Families with young children, older adults, or health concerns may reasonably choose 76°F to 77°F if that provides more dependable comfort. The important thing is to use a consistent setting rather than turning the thermostat down sharply every time the house feels warm.
Setting the thermostat to 68°F does not cool the house faster. Your air conditioner cools at its normal capacity until it reaches the set temperature. A much lower setting simply tells it to run longer, which can waste energy and may leave the home overly cold once the system catches up.
Overnight thermostat settings
Many people sleep better in a cooler room. A setting between 74°F and 77°F is often a comfortable range for sleeping, depending on bedding, fan use, and personal preference. If your bedrooms are noticeably warmer at night, do not assume the answer is always a lower thermostat setting.
Check that bedroom doors are not blocking return-air circulation, ceiling fans are turning counterclockwise, and supply vents are open. A fan does not lower the room temperature, but its airflow helps your body feel cooler. Turn fans off in empty rooms because they only help when people are there to feel the breeze.
What to Set the Thermostat When You Are Away
When the house is empty for several hours, raise the temperature rather than shutting the air conditioner off completely. For many homes, 82°F to 85°F is a reasonable away setting. This reduces cooling demand while helping prevent the indoor temperature and humidity from climbing too high.
In Georgia, humidity is part of the decision. If your home tends to feel clammy, has poor insulation, or has moisture concerns, a setting closer to 80°F to 82°F may be the better choice. Letting the home get excessively hot can make it take longer to recover when you return, and the indoor air may feel muggy even after the temperature comes back down.
Households with pets should also consider their pets’ comfort and safety. A setting around 78°F to 80°F is often more appropriate than allowing the home to reach the mid-80s, especially in homes with lots of sun exposure or limited airflow.
Use a Schedule Instead of Constant Adjustments
A programmable or smart thermostat can take the guesswork out of summer cooling. You can keep a comfortable temperature while everyone is home, raise it during work or school hours, and bring it back down before the family returns. Gradual, planned changes are generally easier on your budget than frequent manual adjustments.
A simple schedule might keep the home at 78°F during the day, raise it to 82°F when the house is empty, and return it to 76°F or 77°F in the evening. There is no single schedule that fits every household. Someone working from home, caring for a child, or managing a property with pets will need a different approach than a home that is empty all afternoon.
Smart thermostats can be helpful, but they are not a cure for HVAC problems. If your system cannot hold the temperature, runs nonstop, or cools some rooms but not others, changing the schedule will not fix the underlying issue.
Humidity Can Matter More Than One Degree
A house at 78°F with balanced humidity can feel more comfortable than a house at 74°F that feels damp. Your air conditioner removes some moisture as it cools, but it needs proper airflow and enough operating time to do that job well. An oversized system can cool too quickly and shut off before it removes sufficient moisture. A dirty filter, clogged drain, refrigerant issue, or airflow problem can also affect comfort.
Aim for indoor humidity around 40% to 60%. If you notice sticky air, condensation on vents or windows, musty odors, or rooms that never seem comfortable, pay attention. Lowering the thermostat may offer temporary relief, but it can also hide a problem that needs service.
Avoid closing off too many supply vents in an effort to force cool air into selected rooms. Modern HVAC systems are designed around a certain amount of airflow. Restricting too many vents can create pressure problems, reduce efficiency, and make cooling less even.
Small Changes That Help Your AC Keep Up
Your thermostat setting works best when the rest of the home supports it. During peak sun, close blinds or curtains on windows that receive direct light. Replace a dirty air filter on schedule, keep outdoor equipment clear of grass and debris, and make sure return vents are not blocked by furniture.
Cooking, laundry, and hot showers also add heat and moisture indoors. Running exhaust fans while cooking or bathing can help, although leaving them on for hours can pull conditioned air out of the home. Use them while needed, then turn them off.
If you have a ceiling fan, set it to rotate counterclockwise during summer. This creates a downward breeze that can help you feel comfortable at a slightly higher thermostat setting. It is one of the simplest ways to reduce the urge to keep lowering the AC.
When Your Thermostat Setting Is Not the Real Problem
If your thermostat is set to 78°F but your house stays at 82°F or higher, your air conditioner may need attention. The same is true if it runs constantly, short-cycles on and off, blows warm air, freezes up, makes unusual noises, or produces a sudden increase in utility costs.
An aging system may also struggle when outdoor temperatures rise, but age alone does not tell the whole story. A trained technician can check airflow, electrical components, refrigerant performance, drainage, ductwork, and thermostat operation before recommending repair or replacement. Straight answers matter, especially when you are deciding whether to invest in an older unit.
Preventative maintenance before or during cooling season can catch smaller issues before they turn into a no-cooling call on the hottest week of summer. RLG Heating and Air helps homeowners and light commercial customers in the Conyers, Dublin, Covington, and surrounding Georgia communities keep their systems dependable with practical repair, maintenance, and replacement support.
A good summer setting should make your home feel like a place to cool down, not another source of stress. Start at 78°F, adjust gradually for your household, and pay attention to humidity and airflow. If comfort still feels out of reach, a professional system check can often provide a clearer answer than another trip to the thermostat.