StarsOutAlert me on good nights
Should you go outside tonight?
Might be worth a look
Partial clearing expected. Keep an eye out.
Calgary
5.4
out of 10
Peak 2h
7.802:00–04:00
Prime 21–01
4.821:00–01:00
Best this week
9.3Sat, Sep 5
Moon
Waning Gibbous
91% lit
Very bright — stick to planets and the moon itself
🔭 Moon up: 20:47–09:51
📍 SE · 31°
Full moon: Sep 26
Sky now
Mostly cloudy · 75%
Measured at CYYC · 9km away · 29min ago
Sun ↓ 20:26·Dark from 21:26·27% clouds
🔭
Moon visible today
06:48 – 08:35 · 91% lit · great for telescope viewing
Next great night
Thursday — 8.5
✨ Great night tonight
Sky quality tonight
Best: 02:00–04:00This 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.