Ideal Bedroom Temperature for Sleep Is About 15.5–20°C
Key takeaway
The ideal room temperature for most adults’ sleep is roughly 15.5–20°C (60–68°F); many people do well around 18–20°C. Avoid hot bedrooms above ~24°C when possible.
- Aim for roughly 15.5–20°C (60–68°F) rather than a warmer 21–23°C “room comfort” setting.
- Many people sleep well around 18–20°C, matching cooler-bedroom guidance.
| Metric | Scientific Observation | Impact Magnitude | ||
|---|---|---|---|---|
| 15.5–20°C (60–68°F) | Consensus cool-room sleep range (NSF/clinical) | Better sleep quality for most adults | ||
| 18–20°C | Practical cool target (aligns with TEMP-51) | Fewer awakenings; higher satisfaction | ||
| >24°C | Impairs nocturnal thermoregulatory cooling | More disturbances; poorer ratings |