Summer in Arizona isn't just hot—it's relentless. When temperatures regularly climb past 110°F, air conditioning isn't a luxury; it's a necessity. But running your AC around the clock can send your electric bills soaring, sometimes to $300, $400, or more per month.
The good news? You don't have to choose between comfort and affordability. With some smart strategies and simple adjustments, you can keep your home cool without breaking the bank.
Here's how to survive Arizona's summer heat while keeping your energy costs under control.
Optimize Your Thermostat
Your thermostat is the command center for summer comfort—and your biggest opportunity for savings.
Find Your Sweet Spot
The U.S. Department of Energy recommends setting your thermostat to 78°F when you're home during summer. Every degree below 78°F increases your cooling costs by approximately 3-4%.
That doesn't mean you have to suffer. Try these strategies:
- Start at 78°F and adjust gradually. Give your body a few days to acclimate before deciding it's too warm.
- Use fans to feel cooler. Ceiling fans and portable fans create a wind-chill effect that makes 78°F feel more like 74°F—at a fraction of the energy cost.
- Accept warmer temperatures at night. Your body naturally cools while sleeping. Many people sleep comfortably at 78-80°F with a fan running.
Raise the Temperature When You're Away
There's no reason to keep your home at 78°F when nobody's there.
- Set your thermostat to 85-88°F when you leave for work. Your AC will use far less energy maintaining a higher temperature.
- Don't turn your AC off completely. In extreme Arizona heat, your home can reach dangerous temperatures (100°F+), which is hard on your belongings and makes cooling down again extremely expensive.
- Lower the temperature 30 minutes before you return. This gives your home time to cool without running the AC hard all day.
Invest in a Programmable or Smart Thermostat
A programmable thermostat automates temperature adjustments based on your schedule. Smart thermostats like Nest, Ecobee, or Honeywell Home go further:
- Learn your habits and adjust automatically
- Allow remote control from your phone
- Provide energy usage reports
- Integrate with utility demand-response programs for additional savings
Many Arizona utilities offer rebates on smart thermostats. Check with your provider—you might save $50-$100 on the purchase price.
Maintain Your AC System
An efficient air conditioning system uses less energy to produce the same cooling. Neglected systems work harder, cost more, and fail sooner.
Change Your Filter Regularly
This is the single most important thing you can do for your AC system.
- Check your filter monthly during summer. Arizona's dusty environment clogs filters faster than other regions.
- Replace disposable filters every 1-3 months. When in doubt, hold the filter up to light—if you can't see through it, replace it.
- Consider upgrading to pleated filters. They capture more dust and allergens, improving both efficiency and air quality.
A dirty filter restricts airflow, forcing your system to work harder. This increases energy consumption and accelerates wear on components.
Schedule Annual Professional Maintenance
Before summer's worst heat arrives, have an HVAC technician inspect and tune your system:
- Clean evaporator and condenser coils
- Check refrigerant levels
- Inspect electrical connections
- Lubricate moving parts
- Test thermostat calibration
- Clear condensate drain lines
Annual maintenance typically costs $75-$150 and can prevent costly breakdowns during peak season when repair wait times are longest.
Keep Your Outdoor Unit Clear
Your AC's condenser unit (the big box outside) needs airflow to release heat efficiently.
- Clear debris, leaves, and vegetation within 2 feet of the unit
- Rinse the unit gently with a hose to remove dust buildup
- Ensure the unit is level and stable
- Consider a shade structure—but not one that restricts airflow
Know When to Replace
If your AC is more than 10-15 years old, it may be time to consider replacement. Modern systems are dramatically more efficient:
- A system from 2005 might have a SEER rating of 10-13
- Current minimum standards require SEER 14-15
- High-efficiency units reach SEER 20-25
Replacing an old system can cut cooling costs by 20-40%. Many utilities offer rebates for high-efficiency installations, and some manufacturers offer summer promotions.
Block the Heat Before It Gets In
The most efficient cooling strategy is preventing heat from entering your home in the first place.
Window Treatments
Windows are a major source of heat gain, especially those facing south and west.
- Close blinds and curtains during the day. This simple step can reduce heat gain by up to 45%.
- Use reflective or blackout curtains. These specialized window treatments block more heat than standard curtains.
- Consider exterior shading. Awnings, shade screens, or solar shades mounted outside windows are even more effective because they stop heat before it reaches the glass.
- Apply window film. Reflective or low-E window films reduce heat gain while still allowing natural light. Professional installation typically costs $5-$10 per square foot.
Seal Air Leaks
Hot outdoor air seeping into your home makes your AC work harder.
- Check weatherstripping around doors and windows. Replace if cracked, flattened, or missing.
- Inspect caulking around window frames, door frames, and where pipes or wires enter your home.
- Don't forget the garage. If your garage shares walls with living space, the door between them should seal tightly.
- Check recessed lighting and electrical outlets on exterior walls. Foam gaskets can reduce air infiltration.
Improve Insulation
Insulation slows heat transfer into your home. Arizona homes—especially older ones—are often under-insulated.
- Start with the attic. Heat radiating through the roof is a major cooling load. The recommended R-value for Arizona attics is R-38 to R-60.
- Consider blown-in insulation. It's relatively affordable and effective for adding attic insulation.
- Insulate ductwork. Ducts running through unconditioned spaces (attics, garages) should be well-insulated and sealed.
Many utilities offer rebates for insulation upgrades. Some also provide free home energy audits to identify your biggest opportunities.
Use Appliances Wisely
Appliances generate heat when they run. During summer, that heat adds to your cooling load.
Cook Strategically
Your oven is essentially a large heating element inside your home. Running it when it's 115°F outside forces your AC to work overtime.
- Grill outside. Keep the heat out of your kitchen entirely.
- Use small appliances. Instant Pots, air fryers, toaster ovens, and slow cookers generate less heat than a full-size oven.
- Microwave when possible. It's fast and adds minimal heat.
- Cook early or late. If you must use the oven, do it in the morning or evening when temperatures are lower.
- Embrace no-cook meals. Salads, sandwiches, and cold dishes keep your kitchen cool.
Run Appliances at Night
Dishwashers, washing machines, and dryers all generate heat and humidity.
- Run the dishwasher after dark. Skip the heated dry cycle—open the door and let dishes air dry.
- Do laundry at night or early morning.
- Use cold water for washing clothes. It saves energy for water heating and reduces heat generation.
- Dry clothes on a line or rack if possible. Dryers generate significant heat.
Mind Your Electronics
Computers, TVs, and gaming consoles generate heat even when idle.
- Turn off electronics when not in use. A desktop computer can add 100+ watts of heat to a room.
- Use power strips to easily cut power to multiple devices.
- Consider a laptop over a desktop. Laptops use less energy and generate less heat.
- Turn off extra lights. Incandescent bulbs are especially wasteful—90% of their energy becomes heat.
Maximize Ceiling Fans
Ceiling fans are dramatically more efficient than air conditioning. A fan costs about 1 cent per hour to run; your AC costs 30-50 cents per hour or more.
Use Fans Correctly
- Set fans to spin counterclockwise in summer. This creates a downward breeze. Most fans have a direction switch on the motor housing.
- Turn off fans when you leave the room. Fans cool people, not rooms. Running them in empty rooms wastes energy.
- Combine fans with higher thermostat settings. A fan lets you set the thermostat 4-6 degrees higher while feeling just as comfortable.
Consider Adding Fans
If rooms lack ceiling fans, installation is relatively affordable and pays for itself through energy savings. Rooms where you spend the most time—bedrooms, living areas, home offices—benefit most.
Portable fans also help. Tower fans, box fans, and oscillating fans can boost airflow in any room.
Take Advantage of Utility Programs
Arizona utilities offer numerous programs to help customers save energy and money.
Time-of-Use Plans
Many utilities offer time-of-use (TOU) rate plans with lower prices during off-peak hours (typically nights and weekends) and higher prices during peak afternoon hours.
If you can shift energy-intensive activities to off-peak times—running appliances at night, pre-cooling your home in the morning—TOU plans can save significant money. However, they require discipline; running your AC heavily during peak hours can actually increase your bill.
Demand Response Programs
Some utilities offer programs where you receive bill credits in exchange for allowing them to briefly cycle your AC during peak demand periods. You maintain control over your comfort level, and the cycling is typically brief and barely noticeable.
Budget Billing
Budget billing averages your annual energy costs into equal monthly payments. You pay the same amount in July as in January, making summer bills more predictable. This doesn't save money overall, but it eliminates the shock of $400 summer bills.
Rebates and Incentives
Check your utility's website for rebates on:
- Smart thermostats
- High-efficiency AC systems
- Insulation upgrades
- Window treatments and films
- Energy audits
These incentives change frequently. A quick check before any efficiency upgrade could save you $50-$500.
Protect Your Home While Saving Energy
Keeping your home cool isn't just about comfort—it's also about protecting your property and belongings.
Extreme heat can damage:
- Electronics and computers
- Wooden furniture and musical instruments
- Medications
- Candles, cosmetics, and other items that melt
- Wine and certain foods
- Pets left at home
If you raise the thermostat while you're away, ensure temperatures stay below levels that could harm sensitive items. Most electronics are safe up to 85-90°F, but some items have lower thresholds.
And remember: your homeowners insurance covers damage from many perils, but gradual damage from heat exposure typically isn't covered. Prevention is your best protection.
Stay Cool All Summer
Arizona summers are challenging, but they don't have to be budget-busting. With smart thermostat habits, regular AC maintenance, heat-blocking strategies, and wise appliance use, you can stay comfortable without dreading your electric bill.
Start with the easiest changes—adjusting your thermostat, changing your filter, closing blinds—and build from there. Even small adjustments add up to real savings over a long, hot summer.
Want to make sure your home is protected all summer long? [Contact us] for a free homeowners insurance review. We'll help you understand your coverage and make sure you're ready for whatever Arizona's summer brings.