StarsOut
Should you go outside tonight?
Might be worth a look
Partial clearing expected. Keep an eye out.
Rio de Janeiro
4.6
out of 10
Peak 2h
6.701:00–03:00
Prime 21–01
4.421:00–01:00
Best this week
8.8Sat, Jun 6
Moon
Full Moon
100% lit
Very bright — stick to planets and the moon itself
🔭 Moon up: 17:20–07:31
📍 SE · 76°
Sky now
Mostly cloudy · 75%
Measured at SBRJ · 1km away · 26min ago
Sun ↓ 17:15·Dark from 18:15·43% clouds
Alert me on good nightsNext great night
Friday — 8.1
✨ Great night tonight
Sky quality tonight
Best: 01:00–03:00This week’s nights
America/Sao PauloHow 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.