StarsOut
Should you go outside tonight?
Probably not tonight
Too much cloud cover for a good session.
Shanghai
4.0
out of 10
Clouds
100%
Moon
New Moon
0% lit
Moon below horizon — perfect darkness
Best window
19:00 – 21:00
Sun ↓ 18:22·Dark from 19:22
Alert me on good nightsNext great night
Saturday — 9.3
🌌 Drop everything — go outside
Sky quality tonight
Best: 19:00–21:00This week’s nights
Asia/ShanghaiHow 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.