Tonight in Hemel Hempstead
Perfect sleeping conditions
You'll sleep beautifully.
Sleep Score
10
⁄10
Excellent
Overnight low
13°C
Cool and sleepable
Stickiness
8°C
Dry & crisp
Cooling by 4am
4.6°C
Cools nicely
Tonight's plan
Cool and fresh tonight — the kind of night your body sleeps best in.
Windows
Open
Cooler, drier air outside — open windows tonight
Heating
Not needed
Cool but comfortably above the 16°C floor — duvet does the work
Bedding
Normal duvet
Standard weight — tonight sits right in the comfortable range
Fan
Not needed
Cool enough without — save the electricity
Based on temperature, dew point, wind, and overnight cooling
Why this matters
13°C is cool — ideal for sleep depth. Research shows deeper slow-wave sleep in cooler bedrooms, as long as the room stays above about 16°C. If your bedroom drops below that, sleep quality starts to decline again.
Dew point is just 8°C — dry, fresh air. This is the kind of night where an open window does exactly what you want it to: brings in cool, comfortable air that helps your body maintain its natural overnight temperature drop.
The week ahead
Tonight will be the best night, fri the worst.
Hemel Hempstead · next 7 nights
Tonight is a good one. Enjoy it.