Best AC Temperature: Save Money & Stay Cool in Phoenix | Arizona Heat 2026

by Chief Editor

Arizona residents are bracing for an early start to air conditioning season as temperatures climb into the triple digits. With the debate over optimal thermostat settings often dividing households, experts are offering guidance on balancing comfort and energy efficiency.

What Temperature Should I Set My AC to in Phoenix?

Whereas there’s no single “magic number,” experts suggest setting thermostats to 78 degrees Fahrenheit. But, the ideal temperature ultimately depends on individual comfort levels, the health of those in the home, a home’s insulation, the apply of supplemental cooling methods like fans, and budget considerations.

Did You Realize? Residents may want to consider setting their thermostat to 79 or 80 degrees when they are away from home.

Brianna Callaway, a spokesperson with Phoenix-based Valley Services, recommends maintaining a consistent temperature while at home, adjusting it minimally when away. “I would say most people like to maintain it around 75 degrees,” Callaway said. “When you’re gone, you could leave it around 79 or 80, but if you’re at home, we recommend keeping it at the same temperature.”

Small adjustments to the thermostat on particularly hot days are acceptable, but maintaining a consistent temperature is key to energy savings during Arizona’s hot summers.

How Can I Conserve Energy When My AC Runs All Day?

Valley Services recommends using and regularly changing fiberglass air filters – every three to four weeks – to optimize AC performance and conserve energy. Dana Marie Kennedy, Arizona director of the American Association of Retired Persons, suggests additional energy-saving measures, including closing blinds during the day, using fans to circulate air, wearing light clothing, limiting the use of high-energy appliances during peak hours, switching off lights and unplugging appliances when not in use, and investing in smart thermostats and energy-efficient appliances.

Expert Insight: Balancing comfort and cost is a common challenge when managing home cooling. Maintaining a consistent temperature, even when away, can minimize energy fluctuations and potentially lower bills, while simple habits like filter changes and mindful appliance use can contribute to significant savings.

Frequently Asked Questions

What factors should I consider when setting my AC temperature?

You should consider what feels comfortable to you and others in your household, the health conditions of people in your household, how well your home is insulated, what other cooling methods you use, and how much you’re willing to pay on your electric bill.

What temperature does Valley Services recommend?

Brianna Callaway, a spokesperson with Valley Services, said most people like to keep it around 75 degrees. She recommends keeping it at the same temperature when at home, and adjusting it to 79 or 80 degrees when away.

How often should I change my AC filter?

Valley Services recommends changing fiberglass filters every three to four weeks to support the AC run better and save energy.

As Arizona temperatures rise, how will you balance staying cool with managing your energy consumption this season?

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