What's the Best AC Temperature Setting for Las Vegas Homes?
Quick Answer:
Best AC settings for Las Vegas: 78°F when home, 82-85°F when away, 72-75°F for sleeping. Each degree above 78°F saves 3-5% on cooling costs. In 110°F+ heat, AC can't maintain below 75-76°F efficiently.
Recommended Thermostat Settings
When Home (Awake)
Sweet spot between comfort and efficiency. DOE recommendation. Feels cool enough after coming in from 110°F+ heat.
When Away (8+ hrs)
Save $30-50/month. House stays cool enough for quick recovery. Don't turn off completely - costs more to re-cool.
Sleeping (Night)
Sleep better in cooler temps. Take advantage of lower overnight outdoor temps (80-90°F vs. 110°F+ daytime).
During 110°F+ Days
Maximum your AC can efficiently maintain. Setting lower wastes energy - AC runs non-stop but barely reaches target.
Common Temperature Mistakes in Las Vegas
- Setting to 72°F on 115°F days: AC runs 24/7, never reaches target, wastes hundreds monthly
- Turning AC off when leaving: Costs more energy to re-cool from 95°F+ indoor temp
- Constant adjustments: Frequent changes confuse programmable thermostats, reduce efficiency
- Lowering temp for faster cooling: AC doesn't work faster at 68°F vs. 78°F, just runs longer
💰 Monthly Savings Calculator:
- • 78°F baseline: ~$300/month July-August
- • 75°F (3° lower): ~$345-360/month (+15-20%)
- • 72°F (6° lower): ~$390-420/month (+30-40%)
- • 80°F (2° higher): ~$270-285/month (-10%)
The Bottom Line
Set your AC to 78°F when home and 82-85°F when away for optimal comfort and savings in Las Vegas. Use a programmable thermostat to automate changes. Every degree above 78°F saves 3-5% monthly. In extreme 115°F heat, don't fight physics - 76-78°F is your realistic minimum.