Best Thermostat Settings for Nashville Summers
Summers in Middle Tennessee can be intense. With high temperatures and humidity levels, your air conditioner works overtime to keep your home comfortable. But if your thermostat isn’t set correctly, you could be wasting energy and paying higher utility bills than necessary.
The good news? With the right thermostat settings and a few smart strategies, you can stay cool while significantly reducing your cooling costs.
In this guide, we’ll break down the best thermostat settings for Nashville summers, along with practical tips to maximize efficiency and comfort.
What Is the Ideal Thermostat Setting in Summer?
According to energy experts, the recommended thermostat setting during summer is:
👉 78°F when you’re at home and awake
This setting provides a balance between comfort and energy efficiency. While it might feel slightly warmer than what you’re used to, your body will adjust quickly—especially when humidity is controlled properly.
Thermostat Settings Based on Your Daily Routine
To truly cut cooling costs, your thermostat should adjust based on your schedule.
When You’re Home (Daytime)
Set your thermostat to 78°F
This reduces energy usage while maintaining comfort.
When You’re Away
Increase your thermostat by 7–10 degrees
👉 Recommended setting: 85°F
There’s no need to cool an empty home. Raising the temperature while you’re out can save up to 10% annually on cooling costs.
When You’re Sleeping
Set your thermostat to 72–75°F
Cooler temperatures at night help improve sleep quality. Many homeowners find 74°F to be a comfortable middle ground.
Why Nashville’s Climate Matters
Nashville summers aren’t just hot—they’re humid. That humidity plays a major role in how your home feels.
High humidity makes air feel warmer than it is
Your AC has to work harder to remove moisture
Improper settings can lead to longer run times and higher bills
That’s why it’s important to balance both temperature and humidity control, not just lower the thermostat.
The Power of a Programmable or Smart Thermostat
If you’re still adjusting your thermostat manually, you’re missing out on major savings.
A programmable or smart thermostat allows you to:
Automatically adjust temperatures throughout the day
Create schedules based on your routine
Control your system remotely from your phone
Track energy usage and optimize performance
Example Schedule:
7:00 AM → 78°F (wake up)
9:00 AM → 85°F (leave home)
5:30 PM → 78°F (return home)
10:30 PM → 74°F (sleep)
This type of automation ensures you’re not overcooling your home when it’s not needed.
Avoid This Common Mistake
Many homeowners believe that setting the thermostat very low (like 68°F) will cool the home faster.
That’s a myth.
Your AC cools at a constant rate. Setting it lower doesn’t speed anything up—it just makes the system run longer, increasing:
Energy consumption
Wear and tear
Utility bills
Stick to gradual, realistic settings for the best results.
Additional Tips to Cut Cooling Costs
Thermostat settings are only part of the equation. Combine them with these tips for maximum efficiency:
1. Use Ceiling Fans
Fans don’t lower temperature—but they help you feel cooler by circulating air.
This allows you to raise your thermostat by 2–4 degrees without sacrificing comfort.
2. Keep Blinds and Curtains Closed
Sunlight can quickly heat up your home.
Close blinds during peak sunlight hours
Use blackout curtains in rooms with heavy sun exposure
This reduces the load on your AC system.
3. Replace Air Filters Regularly
A clogged air filter restricts airflow and forces your system to work harder.
👉 Replace filters every 1–3 months
Clean filters improve efficiency and indoor air quality.
4. Seal Air Leaks
Cool air escaping from:
Windows
Doors
Attic spaces
…means your AC has to run longer.
Sealing leaks improves comfort and lowers energy usage.
5. Schedule AC Maintenance
Routine maintenance ensures your system is operating at peak performance.
During a tune-up, a technician will:
Clean coils
Check refrigerant levels
Inspect electrical components
Optimize airflow
This can improve efficiency by up to 15%.
When to Upgrade Your Thermostat or System
If your home still feels uncomfortable despite adjusting settings, it may be time to upgrade.
Consider:
Installing a smart thermostat
Upgrading to a high-efficiency AC unit
Adding a whole-home dehumidifier
Older systems struggle in Nashville’s humid climate and may not respond efficiently to modern thermostat controls.
Let South Nashville Heating & Cooling Help You Save
At South Nashville Heating & Cooling, we help homeowners take control of their comfort and energy costs.
Our services include:
Smart thermostat installation
AC tune-ups and repairs
High-efficiency system upgrades
Indoor air quality solutions
Duct inspection and sealing
We’ll evaluate your home and recommend the best setup for maximum comfort and minimum cost.
Stay Cool Without Overpaying This Summer
Setting your thermostat correctly is one of the easiest ways to lower your cooling bills—but it works best when combined with proper maintenance and smart HVAC upgrades.
👉 Fill out the form below or contact South Nashville Heating & Cooling today to schedule your AC tune-up or thermostat upgrade.
Let us help you stay cool, comfortable, and energy-efficient all summer long.