February 22, 2019
What Is the Ideal Temperature for Air Conditioning Overnight?
The right overnight temperature balances sleep quality against your power bill. Here's what the research says.
According to the Sleep Foundation, the ideal temperature for sleeping is between 15.6°C and 19.4°C, though most people find 20-22°C comfortable enough. Past 25°C, sleep tends to get restless, and by 26-27°C most people struggle to fall asleep at all.
Tips for a comfortable, cost-effective night
- Cycle the temperature daily: set it 5-6 degrees warmer while you're out during the day, then cooler in the evening for sleep.
- A fan doesn't cool the room, but moving air over your body makes you feel cooler and lets you run the air con less.
- If you have ducted air conditioning, a zoned setup lets your bedroom run cooler overnight while the rest of the house sits warmer.
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