StarsOut
Should you go outside tonight?
Great night tonight
Clear skies and dark conditions. Go outside.
Rovaniemi
8.6
out of 10
Peak 2h
10.000:00–02:00
Prime 21–01
7.521:00–01:00
Best this week
8.4Mon, Jul 20
Moon
Waxing Crescent
11% lit
Moon doesn’t interfere — perfect darkness
🔭 Moon up: 08:21–23:21
Full moon: Jul 29
Sky now
Clear · 0%
Measured at EFRO · 8km away · 24min ago
Sun ↓ 23:56·Dark from 00:56·61% clouds
Alert me on good nightsSky quality tonight
Best: 00:00–02:00This 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.