What’s the Best Temperature to Set Your Air Conditioner in Summer?

When summer weather in Edwardsville turns hot and humid, your thermostat can feel like the most important control in the house. Many homeowners lower the AC setting when the air feels sticky, hoping the home will cool faster. But setting the temperature too low can make the system run longer, use more energy, and increase monthly cooling costs. The better choice is to find a temperature that keeps the home comfortable while helping the AC work efficiently.

In Edwardsville, IL, summer afternoons often bring high humidity and temperatures in the upper 80s and 90s. These conditions can place a heavy load on your cooling system. Since the AC may run often during this season, small thermostat choices can make a big difference over time. B & W Heating & Cooling helps Edwardsville residents choose settings that fit local weather, home comfort, and energy-saving goals. The purpose is not to make your house uncomfortable. It is to find a smart setting that supports comfort without putting extra strain on the system.

This guide explains how to set your AC during summer based on your daily routine. It covers the recommended temperature while you are home, how to adjust the thermostat when you leave, what setting may work better for sleep, and why humidity should always be part of your cooling plan.

Finding the Right Summer AC Setting

The right summer AC setting can vary from home to home. Insulation, airflow, direct sunlight, humidity levels, window quality, and AC condition all affect how cool your space feels. Even so, there are trusted thermostat guidelines that provide a strong place to begin.

1. Start With 78°F When You're Home

The U.S. Department of Energy recommends keeping your thermostat at 78°F in summer when you are home and awake. For many households, this setting offers a good balance between comfort and energy efficiency. It keeps indoor spaces comfortable enough for everyday living while helping the air conditioner avoid unnecessary runtime.

If 78°F sounds too warm, remember that airflow changes how a room feels. Ceiling fans can make a space feel cooler by moving air across your skin. This helps you feel more comfortable without forcing the thermostat lower. If the setting still feels warm, adjust gradually by one or two degrees instead of making a large temperature drop.

2. Understand Why a Higher Setting Saves So Much

A higher thermostat setting can reduce energy use because your AC has less cooling work to do. Each degree above 72°F can reduce cooling costs by roughly 3 percent. When the indoor setting is closer to the outdoor temperature, your system does not need to work as long to reach and maintain the target.

This is why 78°F can be far more efficient than 72°F during a long Edwardsville summer. The system reaches the set temperature faster, cycles off sooner, and avoids longer periods of operation. Over many hot days, those shorter cooling cycles can help lower your overall energy bill.

3. Set It Back 7 to 10 Degrees When You're Away

When no one is inside the home, your AC does not need to maintain the same comfort level. Raising the thermostat 7 to 10 degrees above your regular setting for about eight hours a day can save as much as 10 percent a year on cooling costs. This gives the system a break while still keeping the home from becoming excessively warm.

However, the away setting should not be too high. In most homes, keeping the thermostat below 80 to 85 degrees is a safer choice because the AC still needs to run enough to remove humidity from the air. Edwardsville summers can be muggy, so humidity control matters. A qualified HVAC professional can check whether your system continues to manage moisture properly when you use a warmer away setting.

4. Adjust the Setting Overnight for Sleep

Your best daytime setting may not be the best sleep setting. Many people feel more comfortable sleeping in a cooler room, often between 72 and 75 degrees. Because your body temperature naturally lowers during sleep, a cooler bedroom can help you rest more easily.

If overnight energy savings are important, the Department of Energy suggests raising the thermostat about four degrees from your daytime baseline while sleeping. Your ideal sleep temperature depends on your bedding, airflow, and personal preference. A programmable thermostat can handle this automatically, making it easier to test different nighttime settings without changing the thermostat by hand.

5. Let Ceiling Fans Do Part of the Work

Ceiling fans do not actually lower the air temperature, but they do make people feel cooler. This can allow you to keep the thermostat at a higher setting while still feeling comfortable. In a room where someone is present, a ceiling fan can make 78 feel closer to 74.

Fans should be used only in occupied rooms. They cool people, not empty spaces, so leaving them running when no one is there only wastes electricity. Combining fans with a moderate thermostat setting is one of the easiest ways to improve comfort during an Edwardsville summer. B & W Heating & Cooling often recommends this simple step before homeowners consider larger cooling system changes.

6. Keep Humidity in Mind

In a humid climate, the thermostat number is only part of the comfort picture. Moist air can make your home feel warmer, heavier, and less comfortable even when the temperature seems reasonable. Your air conditioner removes moisture as it cools, which means the system must run often enough to keep indoor air from feeling damp.

This is why an extremely high away setting can create problems. If the AC barely turns on, humidity may build up inside the home. When you return, the space can feel sticky and may take longer to cool. During Edwardsville summers, your thermostat setting should support both temperature control and moisture control.

7. Use a Programmable or Smart Thermostat

A programmable or smart thermostat can make summer cooling much easier. Instead of changing the setting manually throughout the day, you can schedule different temperatures for home, away, and sleep. This helps reduce wasted energy while keeping your home comfortable when you need it.

Smart thermostats add even more flexibility. Many models let you adjust the temperature from your phone, and some can learn your daily routine over time. If plans change or Edwardsville gets a stretch of intense heat, you can update the setting quickly. This makes your cooling routine easier to manage through the full summer season.

8. Adjust to Your Own Comfort

Recommended thermostat numbers are helpful starting points, but they are not fixed rules. Your best AC setting depends on your comfort level, humidity, insulation, airflow, sun exposure, window quality, and how well your system performs. A well-insulated home may stay comfortable at a higher temperature because it holds cooled air longer.

Start near the recommended range and make small changes over time. Move the thermostat one or two degrees at a time, then give your body a few days to adjust. B & W Heating & Cooling can also inspect your system and insulation to see whether your home can maintain the temperature you prefer during an Edwardsville summer.

Why Edwardsville Residents Choose B & W Heating & Cooling

Residents across Edwardsville rely on B & W Heating & Cooling for practical guidance on running their cooling systems efficiently through a humid Midwest summer. The company looks at how a system actually performs in local conditions, including how it manages both temperature and moisture. That local perspective helps you choose settings that hold up through an Edwardsville July.

The service strengths that Edwardsville residents point to most often include:

● Clear advice on thermostat settings for humid summer conditions
● Attention to humidity control, not just temperature
● Honest assessment of system efficiency and sizing
● Thermostat setup and programming guidance
● Familiarity with the demands of the Edwardsville climate
● Practical tips that lower cooling costs without sacrificing comfort

Before choosing an HVAC company, many homeowners want to see what past customers have experienced. You can review past experiences on the B & W Heating & Cooling page on Yelp, where customers describe the work they received. The company also shares seasonal comfort tips and updates through its Facebook page, its YouTube channel, and its Pinterest profile.

Local Air Conditioning Service Across Edwardsville

B & W Heating & Cooling serves homes and businesses throughout Edwardsville, IL, from its Blackburn Road location. The company works with properties across historic areas, downtown spaces, university neighborhoods, and newer residential communities.

● Downtown / Main Street: B & W Heating & Cooling provides cooling service and thermostat guidance for the historic brick storefronts and homes near Main Street.
● Leclaire: B & W Heating & Cooling services cooling systems for the homes in the historic Leclaire Village district on the National Register of Historic Places.
● Governor's Way: B & W Heating & Cooling offers efficiency checks for the homes throughout the Governor's Way subdivision.
● Hearthstone Place: B & W Heating & Cooling handles AC repair and tune-ups for households in the Hearthstone Place neighborhood.
● Hidden Acre Estates: B & W Heating & Cooling provides seasonal service for the homes across Hidden Acre Estates.
● SIUE area: B & W Heating & Cooling supports homes and rental properties near Southern Illinois University Edwardsville.
● Watershed Nature Center area: B & W Heating & Cooling serves neighborhoods near the Watershed Nature Center and the surrounding parks.

Driving Directions to Reach B & W Heating & Cooling

B & W Heating & Cooling operates from Blackburn Road in Edwardsville, IL, a base that keeps the team within reach of neighborhoods across the city. The routes below show how to reach the company from several nearby Edwardsville businesses.

Driving directions from Hoffmann Brothers to B & W Heating & Cooling

• Start at Hoffmann Brothers on University Drive in Edwardsville, IL.

• Head east toward the central Edwardsville area using local connecting roads.

• Continue toward the Blackburn Road area on the east side of the city.

• Arrive at B & W Heating & Cooling, where the team provides cooling service and thermostat guidance.

Driving directions from Heritage Heating & Cooling to B & W Heating & Cooling

• Start at Heritage Heating & Cooling on East Park Street in Edwardsville, IL.

• Travel east toward the Blackburn Road area using local roads.

• Follow connecting streets toward the east side of Edwardsville.

• Reach B & W Heating & Cooling, where the team handles cooling repair and humidity control service.

Driving directions from Classic Aire Care to B & W Heating & Cooling

• Start at Classic Aire Care on Sunset Hills Executive Drive in Edwardsville, IL.

• Head northeast toward the central Edwardsville area using local connecting roads.

• Continue toward the Blackburn Road area on the east side of the city.

• Arrive at B & W Heating & Cooling, where the team provides cooling diagnostics and thermostat setup.

Final Thoughts

A practical AC plan for summer starts with 78°F while you are home, a 7 to 10 degree setback when the house is empty, and a nighttime setting that helps you sleep comfortably. Each degree above 72 can help reduce cooling costs, while a reasonable away setting can save energy without allowing humidity to build too much. In Edwardsville, controlling moisture is just as important as controlling temperature.

Your best setting should match your home, your comfort needs, and your AC system. Ceiling fans, insulation, and a programmable thermostat can make a higher temperature feel more comfortable. B & W Heating & Cooling helps Edwardsville residents find that balance and confirm their equipment can maintain their preferred settings.

If you are comparing cooling providers in the area, it helps to review independent listings before deciding. Details about the company's service record appear on its local business profile and its Nextdoor page, where neighbors share their experiences with the company.

Frequently Asked Questions

What is the best AC temperature for summer in Edwardsville, IL?

For many Edwardsville homes, 78°F is a practical starting point when people are home and awake. It helps balance comfort with energy savings. When the weather is humid, ceiling fans can make this setting feel cooler and more comfortable.

How much can I save by raising my thermostat in summer?

Each degree above 72°F can reduce cooling costs by roughly 3 percent. Raising the thermostat 7 to 10 degrees for about eight hours while you are away can save as much as 10 percent per year. During a long Edwardsville summer, that difference can become noticeable.

What temperature should I set my AC when I leave the house?

Set the thermostat 7 to 10 degrees higher than your normal comfort setting when the house is empty. Keep it below 80 to 85 degrees so the AC still runs enough to remove humidity. If the setting is too high, the home can feel damp and take longer to cool when you return.

Is 78 degrees really comfortable in an Edwardsville summer?

For many people, 78°F can feel comfortable with the help of ceiling fans and steady airflow. Moving air makes the body feel cooler than the thermostat reading alone. If it feels too warm at first, lower the setting gradually and give yourself time to adjust.

What temperature is best for sleeping with the AC on?

Many people sleep best in a room between 72 and 75 degrees. A cooler bedroom can feel more restful because the body naturally cools down during sleep. To save energy, try a slightly warmer overnight setting and use a programmable thermostat to find the right balance.

Why does humidity affect what temperature I should set?

Humidity can make a home feel warmer and less comfortable even when the thermostat number looks fine. Your AC removes moisture while it cools, which helps the indoor air feel better. If the system rarely runs, humidity can build up. During humid Edwardsville summers, setting the thermostat too high while away can make the house feel sticky.

When should I call B & W Heating & Cooling about my AC settings?

Call B & W Heating & Cooling if your home feels humid, your AC has trouble holding the set temperature, or you need help programming your thermostat. The team can check system efficiency, sizing, and humidity performance before recommending settings for your home. This can help your AC work more efficiently through the Edwardsville summer.