StarsOutAlert me on good nights
Should you go outside tonight?
Probably not tonight
Too much cloud cover for a good session.
Rovaniemi
3.9
out of 10
Peak 2h
5.021:00–23:00
Prime 21–01
4.621:00–01:00
Best this week
8.5Thu, Sep 3
Moon
Waning Gibbous
84% lit
Very bright — stick to planets and the moon itself
🔭 Moon up: 20:09–11:07
📍 W · 15°
Full moon: Sep 26
Sun ↓ 20:47·Dark from 21:47·95% clouds
🔭
Moon visible today
05:50 – 09:24 · 84% lit · great for telescope viewing
Next great night
Thursday — 8.5
✨ Great night tonight
Sky quality tonight
Best: 21:00–23:00This week’s nights
Europe/HelsinkiHow 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.