StarsOutAlert me on good nights
Should you go outside tonight?
Probably not tonight
Too much cloud cover for a good session.
Lima
3.8
out of 10
Low confidence
Currently overcast — score adjusted to match what the sky looks like now.
Peak 2h
6.420:00–22:00
Prime 21–01
5.821:00–01:00
Best this week
7.7Tue, Jun 9
Moon
Waning Gibbous
87% lit
Very bright — stick to planets and the moon itself
🔭 Moon up: 20:42–09:49
Full moon: Jun 29
Sky now
Mostly cloudy · 75%
Measured at SPJC · 8km away · 19min ago
Sun ↓ 17:50·Dark from 18:50·45% clouds
🔭
Moon visible today
06:23 – 09:04 · 87% lit · great for telescope viewing
Next great night
Friday — 7.4
🌙 Good night ahead
Sky quality tonight
Best: 20:00–22:00This week’s nights
America/LimaHow 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.