StarsOutAlert me on good nights
Should you go outside tonight?
Not worth it tonight
Clouds will block the view. Stay inside.
Calgary
0.0
out of 10
Peak 2h
0.022:00–00:00
Prime 21–01
0.021:00–01:00
Best this week
8.1Fri, Jun 5
Moon
Full Moon
100% lit
Very bright — stick to planets and the moon itself
🔭 Moon up: 22:55–05:40
Sun ↓ 21:40·Dark from 22:40·100% clouds
🔭
Moon visible today
18:07 – 21:40 · 100% lit · great for telescope viewing
Next great night
Friday — 8.1
✨ Great night tonight
Sky quality tonight
Best: 22:00–00:00This week’s nights
America/EdmontonHow 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.