StarsOut
Should you go outside tonight?
Not worth it tonight
Clouds will block the view. Stay inside.
São Paulo
3.0
out of 10
Low confidence
Currently overcast — score adjusted to match what the sky looks like now.
Peak 2h
5.418:00–20:00
Prime 21–01
3.921:00–01:00
Best this week
8.7Sat, Jun 6
Moon
Full Moon
100% lit
Very bright — stick to planets and the moon itself
🔭 Moon up: 17:32–07:47
📍 E · 71°
Sky now
Overcast · 100%
Measured at SBMT · 5km away · 15min ago
Sun ↓ 17:27·Dark from 18:27·72% clouds
Alert me on good nightsNext great night
Saturday — 8.7
✨ Great night tonight
Sky quality tonight
Best: 18:00–20:00This 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.