StarsOut
Should you go outside tonight?
Probably not tonight
Too much cloud cover for a good session.
Ottawa
4.0
out of 10
Clouds
100%
Moon
Waning Crescent
2% lit
Moon below horizon — perfect darkness
Best window
20:00 – 22:00
Sun ↓ 19:48·Dark from 20:48
Alert me on good nightsNext great night
Sunday — 7.0
🌙 Good night ahead
Sky quality tonight
Best: 20:00–22:00This 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.