StarsOutAlert me on good nights
Should you go outside tonight?
Good night ahead
Mostly clear. Worth setting up.
Toronto
6.2
out of 10
Peak 2h
9.103:00–05:00
Prime 21–01
5.721:00–01:00
Best this week
9.1Fri, Sep 4
Moon
Waning Gibbous
66% lit
Bright moon — reduces deep sky visibility
🔭 Moon up: 21:38–13:02
📍 E · 48°
Full moon: Sep 26
Sky now
Overcast · 100%
Measured at CYYZ · 20km away · 7min ago
Sun ↓ 19:51·Dark from 20:51·70% clouds
🔭
Moon visible today
06:43 – 11:01 · 66% lit · great for telescope viewing
Next great night
Thursday — 7.9
✨ Great night tonight
Sky quality tonight
Best: 03:00–05:00This week’s nights
America/TorontoHow 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.