StarsOutAlert me on good nights
Should you go outside tonight?
Probably not tonight
Too much cloud cover for a good session.
Oulu
4.2
out of 10
Peak 2h
6.015:00–17:00
Prime 21–01
4.621:00–01:00
Best this week
8.4Sun, Jun 7
Moon
Waning Gibbous
98% lit
Very bright — stick to planets and the moon itself
Sky now
Clear · 0%
Measured at EFOU · 10km away · 27min ago
Sun ↓ 23:36·Dark from 00:36·94% clouds
🔭
Moon visible today
18:56 – 23:36 · 98% lit · great for telescope viewing
Next great night
Friday — 7.7
✨ Great night tonight
Sky quality tonight
Best: 15:00–17:00This 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.