What is a Good Temperature for Air Conditioning?

One of the most common questions I’m asked is, “What is a good temperature for air conditioning?”

While the answer can be subjective and depend on several factors, including personal comfort level and energy efficiency goals, there are some general guidelines that can help you find the perfect temperature for your home.

Understanding the Ideal Temperature for Air Conditioning

Energy Star, the U.S. government’s program for energy efficiency, recommends setting your air conditioner temperature to 78 degrees Fahrenheit (25.5 degrees Celsius) when you’re at home during the summer months.

This is often considered a reasonable temperature, offering a balance between comfort, energy efficiency, and protection for your air conditioning unit.

However, individual comfort levels and health conditions can influence your ideal temperature. Some people might prefer a cooler temperature, especially in extreme temperatures, while others might feel comfortable at a higher setting.

The key is to find a temperature that’s comfortable for you and is also energy-efficient.

Balancing Comfort and Energy Efficiency

When considering the ideal AC temperature, it’s crucial to balance personal comfort with energy efficiency.

Every degree lower can increase your energy consumption by up to 8%, affecting your energy bills.

While your personal comfort shouldn’t be compromised, understanding how temperature settings impact energy usage can help you make more informed decisions.

Factors Affecting the Ideal Air Conditioning Temperature

Several factors can influence the ideal air conditioning temperature. Outdoor temperatures, humidity levels, and your temperature preferences play significant roles in determining a comfortable temperature.

During times of high humidity, you may need to adjust your thermostat temperature slightly lower to feel comfortable. However, remember to also use a dehumidifier or your AC’s “dry” mode to reduce humidity without overcooling your home.

Seasonal Variations in Ideal Air Conditioning Temperature

The time of year also impacts what you might consider the average air conditioning temperature. In the summer heat, maintaining a cooler temperature indoors provides a much-needed respite.

However, keeping your air conditioner temperature close to the outdoor temperature can result in significant energy savings.

During the cooler months, you might want to adjust your temperature settings higher to save on utility costs, using ceiling fans to circulate air and maintain a consistent temperature.

Impact of Ideal Temperature on Energy Costs

Your air conditioner temperature settings significantly impact your energy bills. By adjusting the thermostat just a few degrees higher, you can save on your monthly energy cost.

For instance, raising your thermostat setting from 72°F to 78°F can save up to 18% off your cooling costs.

Using Programmable and Smart Thermostats for Optimal Temperature Control

Programmable thermostats and smart thermostats can help maintain your preferred temperature range efficiently.

These devices allow you to set temperature preferences for different times of the day, helping you save energy when you’re not home or asleep. For instance, you can set a higher temperature for when you’re at work and have the AC kick in just before you return.

Tips for Achieving the Ideal Air Conditioning Temperature

Finding the ideal air conditioning temperature is about more than adjusting your thermostat. Other measures can help you maintain a comfortable indoor temperature while reducing reliance on your AC:

  1. Use Ceiling Fans: Ceiling fans can make a room feel 4°F cooler by creating a wind-chill effect.
  2. Maintain Your AC: Regular maintenance tasks, like keeping the air filter and unit clean, can improve your AC’s efficiency.
  3. Block out the Sun: Use blackout curtains or blinds during the hottest part of the day to keep your home cooler.
  4. Insulate Your Home: Proper insulation can keep warm air out and cool air in, reducing the burden on your AC.

The 8-hour Rule and Energy Savings

A handy rule of thumb to remember when setting your AC temperature is the 8-hour rule.

If you’re going to be away from home for more than 8 hours, it’s recommended to adjust your thermostat 5 to 10 degrees higher in the summer (or lower in the winter) to achieve optimal energy savings.

Using this approach along with a programmable thermostat that can automatically adjust temperatures based on your schedule can further enhance your energy savings.

The Ideal Temperature for Sleeping

Your body temperature naturally decreases during sleep, and a cooler bedroom can help facilitate this process, potentially improving your sleep quality.

The National Sleep Foundation recommends a bedroom temperature of around 65°F (18.3°C) for optimal sleep.

However, this can vary based on individual preferences and the type of bedding and sleepwear you use.

To balance comfort and energy efficiency during sleeping hours, consider using a programmable thermostat to lower the AC temperature at bedtime and raise it again in the morning.

Energy-Efficient Appliances and Practices

Beyond setting the ideal temperature for air conditioning, you can enhance your home’s energy efficiency with energy-efficient appliances and practices.

For instance, replacing an older air conditioning unit with a new, Energy Star-rated model can significantly reduce your cooling costs.

An energy-efficient air conditioner uses less electricity for the same cooling output, helping you save on energy costs.

Similarly, practices such as sealing drafts around windows and doors, adding insulation in your attic, and using energy-efficient lighting can further reduce your home’s energy consumption and help maintain a consistent temperature indoors.

Optimizing Your Home for Natural Ventilation

During certain times of the year, you might be able to use natural ventilation to cool your home instead of relying solely on air conditioning.

If the temperature outside drops lower than your preferred indoor temperature at night, opening windows can help cool your home.

Just remember to close them, along with window shades and blinds, once the temperature starts rising in the morning.


Determining the perfect temperature for air conditioning is a balance between personal comfort and energy efficiency.

By considering the above factors and using the latest technology, such as smart thermostats, you can maintain a comfortable indoor temperature while managing your energy costs effectively.

Remember that regular maintenance of your air conditioning units is crucial in ensuring their efficient operation and longevity.

About Roy Cohen

Roy Cohen has a burning passion for heating, cooling, and ventilation. He aims to help you save money on expensive repairs and bring you the best HVAC products. He has years of experience behind him in HVAC repair and garage maintenance.

You can find Roy at his LinkedIn or his email: [email protected]

Related Posts