StarsOutAlert me on good nights
Should you go outside tonight?
Might be worth a look
Partial clearing expected. Keep an eye out.
Lahti
5.6
out of 10
Low confidence
Models disagree on tonight — actual conditions may be cloudier.
Peak 2h
7.201:00–03:00
Prime 21–01
5.821:00–01:00
Best this week
8.6Fri, Jun 5
Moon
Waning Gibbous
98% lit
Very bright — stick to planets and the moon itself
🔭 Moon up: 01:24–03:39
Sun ↓ 22:34·Dark from 23:34·96% clouds
🔭
Moon visible today
18:56 – 22:34 · 98% lit · great for telescope viewing
Next great night
Friday — 8.6
✨ Great night tonight
Sky quality tonight
Best: 01:00–03:00This 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.