The best summer AC temperature? Experts have an unpopular answer.

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Summer 2025 is here and temperatures are reaching dangerous levels, making air conditioning important for comfort and safety.
But what temperature should you set your thermostat at? The answer is a balancing act between energy savings, comfort and safety.
'It is essential to stay cool during hot weather — use air conditioning or go to a cool place where you feel comfortable,' Dr. Michelle Morse, New York City's acting health commissioner, said in a statement. 'Heat is dangerous, but taking certain precautions can prevent illness and protect your health.'
People also have bills to pay as AC demand skyrockets. Here are ways to stay cool while balancing budgets.
Summer 2025 brings killer heat. Here are some surprising ways to stay safe.
The best temperature to set your air conditioning is 78 degrees Fahrenheit when you wake up, according to the U.S. Environmental Protection Agency's Energy Star program. Energy companies in Florida, Maryland and Missouri also recommend thermostats at 78 degrees during summer months.
Not many people follow this recommendation, as a 2021 Consumer Reports survey showed. And a 2024 poll from the Detroit Free Press, part of the USA TODAY Network, found 72 degrees was a favorite among readers.
But setting your thermostat at a higher temperature can maximize efficiency.
As temperatures ideally drop at night, people should set thermostats 4 degrees warmer when they go to sleep.
If you're away from home, you can avoid unnecessary energy usage by setting temperatures 7 degrees warmer, the energy department said. Even 7 to 10 degrees, for around 8 hours daily, can save up to 10% annually on cooling and heating.
Since windows bring in heat, window curtains can help keep indoors cooler.
Look for air leaks — such as windows, baseboards and doors — and seal them to keep cool air in and hot air outside.
Reduce use of appliances that generate heat, such as stoves or ovens.
Use fans to circulate cool air, but don't use them as your only cooling device.
There are other methods to stay cool, which USA TODAY compiled here. You should also check on others who may be more vulnerable to heat-related illness, including young children, older people and people with chronic health issues.
If it gets too hot, look for a nearby cooling center. Even public areas, such as malls, museums or pools, can give critical respite.
Contributing: Jeanine Santucci and Greta Cross, USA TODAY.
Eduardo Cuevas is based in New York City. Reach him by email at [e-mail] or on Signal at emcuevas.01.
This article originally appeared on USA TODAY: Experts say this is best AC temperature amid heat wave