Every summer, Savannah homeowners face the same challenge: how do you keep the house comfortable without sending your energy bill through the roof?
The right thermostat setting can make a bigger difference than many people realize. Set it too low, and your AC runs longer, works harder, and uses more electricity. Set it too high, and your home can feel sticky, especially during a humid Coastal Georgia summer.
In Savannah, summer comfort is not just about the number on the thermostat. Long cooling seasons, heavy humidity, older home layouts, upstairs bedrooms, and rising Georgia Power bills all affect how hard your AC has to work. The best thermostat settings for summer depend on when you are home, when you are away, how well your home holds cool air, and how your AC system handles humidity.
With a few smart adjustments, you can reduce energy waste without making your home uncomfortable. Let’s break down the best thermostat settings for summer and how to use them in a way that works for real life in Savannah.
Quick Answer: What Are the Best Thermostat Settings for Summer?
For many homes, a good summer thermostat setting is around 78 degrees when you are home and a few degrees higher when you are away. At night, many homeowners prefer a slightly lower setting for sleep comfort.
The goal is not to make your home feel warm. The goal is to find the highest comfortable setting so your air conditioner does not run longer than necessary. In Savannah’s humid climate, it is also important to make sure your AC runs long enough to remove moisture from the air.
Why Thermostat Settings Matter in Summer
Your thermostat controls how often your air conditioner turns on and how long it runs.
When you set the thermostat much lower than needed, your AC does not cool your home faster. It simply keeps running longer until the home reaches the lower temperature. That extra runtime can increase energy use, put more wear on the system, and raise the risk of breakdowns during the hottest months.
In Savannah and nearby Coastal Georgia communities, summer heat is only part of the comfort problem. Humidity also plays a major role. A home can feel uncomfortable even when the temperature looks reasonable if the air is too damp.
That is why the best AC temperature for summer is not always the lowest setting. It is the setting that keeps your home comfortable while allowing your system to run efficiently.
Best Thermostat Setting When You Are Home
A good starting point for many homes is 78 degrees during the day when people are home.
Some homeowners may prefer 76 or 77 degrees, especially if they have young children, older adults, upstairs bedrooms, or rooms with heavy sun exposure. Others may feel comfortable closer to 79 or 80 degrees if they use ceiling fans and keep blinds closed during peak afternoon heat.
The key is to adjust gradually. Try raising your thermostat by one degree at a time and give your home a chance to respond. For many homeowners, even moving from 74 to 76 or 77 degrees can reduce runtime without making the home feel uncomfortable, especially when ceiling fans and clean filters are part of the routine.
Best Thermostat Setting When You Are Away
When no one is home, raise the temperature a few degrees rather than turning the system off completely.
For many households, setting the thermostat around 82 to 85 degrees while away can help reduce energy use without letting the home become overly hot or humid.
This is especially important in Savannah. Turning the AC off completely can allow heat and humidity to build up indoors. When you return home, your system may have to run for a long time to cool the house back down and remove moisture from the air.
In Savannah, the goal is not just to keep the house from getting hot. It is also to keep indoor humidity from climbing so high that the AC has to fight both heat and moisture when you return. A small temperature setback is usually better than shutting the system off.
Best Thermostat Setting for Sleeping
Sleep comfort is personal, so there is no single perfect number for every home.
Many homeowners prefer the thermostat between 72 and 76 degrees at night, especially in humid weather. If that feels too cool for your budget, try using ceiling fans, breathable bedding, and a slightly higher setting to stay comfortable without overworking the AC.
If your bedroom is always warmer than the rest of the house, the thermostat setting may not be the real problem. Uneven cooling can be caused by ductwork issues, poor airflow, attic heat, insulation problems, or an AC system that is not performing properly.
Should You Use Auto or On for the Fan?
In most cases, the Auto setting is better for summer.
When the fan is set to Auto, it runs only when the AC is actively cooling. This helps the system remove humidity more effectively and reduces unnecessary energy use.
When the fan is set to On, it runs continuously. While this may help move air around, it can also blow moisture back into the home after the cooling cycle ends. In Savannah’s humid climate, that can make your home feel less comfortable.
How a Smart Thermostat Can Help
A smart thermostat can make summer comfort easier by automatically adjusting temperatures based on your schedule.
For example, it can keep your home warmer while you are away, then begin cooling before you return. Many models also allow remote control from your phone, which is helpful if your schedule changes during the day.
Smart thermostat settings can help save energy, but they cannot fix airflow problems, dirty filters, leaking ducts, or an aging AC system. If your home never reaches the temperature you set, there may be a larger cooling issue that needs attention.
Tips to Stay Comfortable at a Higher Thermostat Setting
You do not always have to lower the thermostat to feel cooler. Try these simple steps first:
- Use ceiling fans while rooms are occupied
- Close blinds or curtains during peak afternoon sun
- Replace dirty air filters regularly
- Keep supply vents open and unblocked
- Avoid using ovens or heat-producing appliances during the hottest part of the day
- Schedule AC maintenance before peak summer demand
These small changes help your AC work more efficiently and make a slightly higher thermostat setting feel more comfortable.
When Thermostat Changes Are Not Enough
If you keep adjusting the thermostat but your home still feels hot, humid, or uneven, the thermostat may not be the issue.
You may need professional HVAC service if:
- Your AC runs constantly but never reaches the set temperature
- Some rooms are much hotter than others
- Your home feels sticky even when the AC is running
- Your energy bills keep rising
- The system cycles on and off frequently
- The thermostat reading does not match how the home feels
If you are doing everything right and the house still feels hot, sticky, or uneven, the issue may not be your thermostat setting. It may be airflow, maintenance, ductwork, refrigerant, or system age. These problems can point to airflow issues, refrigerant problems, dirty coils, duct leaks, poor insulation, or an aging system that can no longer keep up with Savannah’s heat.
Frequently Asked Questions About Summer Thermostat Settings
Is 78 degrees really the best thermostat setting for summer?
For many homes, 78 degrees is a good starting point for summer comfort and energy savings. However, the best setting depends on your home, health needs, humidity levels, and comfort preferences. If 78 feels too warm, try 76 or 77 and use fans to improve comfort.
Is it cheaper to leave the AC at one temperature all day?
Usually, no. It often saves energy to raise the temperature a few degrees when you are away. The key is not to shut the system off completely in hot, humid weather because your AC may have to work harder to cool and dehumidify the home later.
Why does my house feel humid even when the thermostat is set low?
Your AC may not be running long enough to remove humidity, or there may be an issue with system sizing, airflow, dirty coils, or drainage. In Savannah, humidity control is a major part of indoor comfort.
Should I lower the thermostat if my AC is not cooling fast enough?
Lowering the thermostat will not make your AC cool faster. It only tells the system to run longer. If your AC struggles to cool your home, there may be a repair, maintenance, airflow, or ductwork issue.
Can a smart thermostat lower my energy bill?
A smart thermostat can help lower energy use by adjusting temperatures automatically based on your schedule. The biggest savings usually come when it is used with good habits, routine maintenance, clean filters, and a properly working AC system.
Stay Comfortable Without Overworking Your AC
The best thermostat settings for summer are not about choosing one magic number. They are about finding the right balance between comfort, humidity control, and energy savings.
For many Savannah homeowners, that means setting the thermostat around 78 degrees when home, raising it a few degrees when away, and making small adjustments based on how the home feels. If your AC still struggles, the issue may be bigger than the thermostat.
With nearly 50 years serving Savannah and Coastal Georgia, Polar Air Inc. understands how local heat, humidity, ductwork, and aging equipment affect comfort inside the home. If your thermostat settings are not giving you the comfort you need, schedule service with Polar Air today and get clear answers from a local team that understands Lowcountry heat and humidity.
