StarsOutAlert me on good nights
Should you go outside tonight?
Probably not tonight
Too much cloud cover for a good session.
Prague
3.8
out of 10
Low confidence
Currently overcast — score adjusted to match what the sky looks like now.
Peak 2h
6.302:00–04:00
Prime 21–01
5.121:00–01:00
Best this week
8.2Sun, Jun 7
Moon
Waning Gibbous
98% lit
Very bright — stick to planets and the moon itself
🔭 Moon up: 21:54–04:57
📍 S · 11°
Sky now
Overcast · 100%
Measured at LKKB · 9km away · 31min ago
Sun ↓ 21:02·Dark from 22:02·67% clouds
🔭
Moon visible today
04:56 – 07:26 · 98% lit · great for telescope viewing
Next great night
Friday — 7.8
✨ Great night tonight
Sky quality tonight
Best: 02:00–04:00This week’s nights
Europe/PragueHow 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.