StarsOut
Should you go outside tonight?
Great night tonight
Clear skies and dark conditions. Go outside.
Chicago
8.7
out of 10
Peak 2h
9.102:00–04:00
Prime 21–01
8.621:00–01:00
Best this week
9.5Sat, Jul 18
Moon
Waxing Crescent
5% lit
Moon doesn’t interfere — perfect darkness
🔭 Moon up: 08:05–22:03
Full moon: Jul 29
Sky now
Clear · 0%
Measured at KGYY · 35km away · 83min ago
Sun ↓ 20:23·Dark from 21:23·72% clouds
Alert me on good nightsSky quality tonight
Best: 02:00–04:00This 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.