StarsOutAlert me on good nights
Should you go outside tonight?
Probably not tonight
Too much cloud cover for a good session.
Chicago
3.1
out of 10
Low confidence
Currently overcast — score adjusted to match what the sky looks like now.
Peak 2h
6.700:00–02:00
Prime 21–01
4.921:00–01:00
Best this week
9.0Fri, Sep 4
Moon
Waning Gibbous
91% lit
Very bright — stick to planets and the moon itself
🔭 Moon up: 20:03–08:51
📍 S · 51°
Full moon: Sep 26
Sky now
Overcast · 100%
Measured at KGYY · 35km away · 14min ago
Sun ↓ 19:27·Dark from 20:27·92% clouds
🔭
Moon visible today
06:15 – 08:35 · 91% lit · great for telescope viewing
Next great night
Wednesday — 8.3
✨ Great night tonight
Sky quality tonight
Best: 00:00–02:00This week’s nights
America/ChicagoHow 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.