StarsOut
Should you go outside tonight?
Good night ahead
Mostly clear. Worth setting up.
Bern
7.5
out of 10
Low confidence
Models disagree on tonight — actual conditions may be cloudier.
Peak 2h
8.403:00–05:00
Prime 21–01
7.521:00–01:00
Best this week
9.5Fri, Jul 17
Moon
Waxing Crescent
5% lit
Moon doesn’t interfere — perfect darkness
🔭 Moon up: 08:11–22:45
Full moon: Jul 29
Sky now
Clear · 13%
Measured at LSZB · 5km away · 15min ago
Sun ↓ 21:20·Dark from 22:20·91% clouds
Alert me on good nightsSky quality tonight
Best: 03:00–05:00This week’s nights
Europe/ZurichHow the score works
60% weight
Cloud cover
Layer-weighted across the best 2-hour window of the night. Low clouds block everything, thin high cirrus still lets bright stars through.
40% weight
Moon darkness
A new moon boosts the score. A full moon near midnight washes out all but the brightest stars. We ease the penalty after midnight when the moon is setting.