StarsOut
Should you go outside tonight?
Good night ahead
Mostly clear. Worth setting up.
Lucerne
7.2
out of 10
Low confidence
Models disagree on tonight — actual conditions may be cloudier.
Peak 2h
7.423:00–01:00
Prime 21–01
7.321:00–01:00
Best this week
9.9Sat, Jul 18
Moon
Waxing Crescent
5% lit
Moon doesn’t interfere — perfect darkness
🔭 Moon up: 08:07–22:42
Full moon: Jul 29
Sky now
Mostly cloudy · 75%
Measured at LSME · 5km away · 11min ago
Sun ↓ 21:17·Dark from 22:17·100% clouds
Alert me on good nightsSky quality tonight
Best: 23:00–01:00This 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.