Pick the dates from geometry.
Moon and darkness timing can be calculated ahead; weather becomes less certain further out. Choose the window now and check the cloud when it gets close. Thirty nights at La Prairie.
10 Oct · La Prairie
New moon · 1% lit at local midnight.
Astronomical darkness
10 Oct · 20:00 → 11 Oct · 05:40 (9.7h)
Moon below horizon during darkness
9.7h total.
Longest window for your filters
10 Oct · 20:00 → 11 Oct · 05:40 Meets your minimum duration.
Times in America/Toronto · approximately 20-minute samples. Geometry only, not a weather forecast.
11 Oct · La Prairie
Waxing crescent · 3% lit at local midnight.
Astronomical darkness
11 Oct · 20:00 → 12 Oct · 05:40 (9.7h)
Moon below horizon during darkness
9.7h total.
Longest window for your filters
11 Oct · 20:00 → 12 Oct · 05:40 Meets your minimum duration.
Times in America/Toronto · approximately 20-minute samples. Geometry only, not a weather forecast.
12 Oct · La Prairie
Waxing crescent · 7% lit at local midnight.
Astronomical darkness
12 Oct · 20:00 → 13 Oct · 05:40 (9.7h)
Moon below horizon during darkness
9.7h total.
Longest window for your filters
12 Oct · 20:00 → 13 Oct · 05:40 Meets your minimum duration.
Times in America/Toronto · approximately 20-minute samples. Geometry only, not a weather forecast.
13 Oct · La Prairie
Waxing crescent · 13% lit at local midnight.
Astronomical darkness
13 Oct · 20:00 → 14 Oct · 05:40 (9.7h)
Moon below horizon during darkness
9.7h total.
Longest window for your filters
13 Oct · 20:00 → 14 Oct · 05:40 Meets your minimum duration.
Times in America/Toronto · approximately 20-minute samples. Geometry only, not a weather forecast.
14 Oct · La Prairie
Waxing crescent · 20% lit at local midnight.
Astronomical darkness
14 Oct · 20:00 → 15 Oct · 05:40 (9.7h)
Moon below horizon during darkness
9.3h total.
Longest window for your filters
14 Oct · 20:00 → 15 Oct · 05:40 Meets your minimum duration.
Times in America/Toronto · approximately 20-minute samples. Geometry only, not a weather forecast.
15 Oct · La Prairie
Waxing crescent · 28% lit at local midnight.
Astronomical darkness
15 Oct · 20:00 → 16 Oct · 05:40 (9.7h)
Moon below horizon during darkness
8.7h total.
Longest window for your filters
15 Oct · 20:00 → 16 Oct · 05:40 Meets your minimum duration.
Times in America/Toronto · approximately 20-minute samples. Geometry only, not a weather forecast.
16 Oct · La Prairie
Waxing crescent · 37% lit at local midnight.
Astronomical darkness
16 Oct · 20:00 → 17 Oct · 05:40 (9.7h)
Moon below horizon during darkness
7.7h total.
Longest window for your filters
16 Oct · 20:00 → 17 Oct · 05:40 Meets your minimum duration.
Times in America/Toronto · approximately 20-minute samples. Geometry only, not a weather forecast.
17 Oct · La Prairie
First quarter · 46% lit at local midnight.
Astronomical darkness
17 Oct · 20:00 → 18 Oct · 05:40 (9.7h)
Moon below horizon during darkness
6.7h total.
Longest window for your filters
17 Oct · 20:00 → 18 Oct · 05:40 Meets your minimum duration.
Times in America/Toronto · approximately 20-minute samples. Geometry only, not a weather forecast.
18 Oct · La Prairie
First quarter · 55% lit at local midnight.
Astronomical darkness
18 Oct · 20:00 → 19 Oct · 05:40 (9.7h)
Moon below horizon during darkness
5.7h total.
Longest window for your filters
18 Oct · 20:00 → 19 Oct · 05:40 Meets your minimum duration.
Times in America/Toronto · approximately 20-minute samples. Geometry only, not a weather forecast.
19 Oct · La Prairie
Waxing gibbous · 65% lit at local midnight.
Astronomical darkness
19 Oct · 20:00 → 20 Oct · 05:40 (9.7h)
Moon below horizon during darkness
4.7h total.
Longest window for your filters
19 Oct · 20:00 → 20 Oct · 05:40 Meets your minimum duration.
Times in America/Toronto · approximately 20-minute samples. Geometry only, not a weather forecast.
20 Oct · La Prairie
Waxing gibbous · 74% lit at local midnight.
Astronomical darkness
20 Oct · 19:40 → 21 Oct · 05:40 (10.0h)
Moon below horizon during darkness
3.3h total.
Longest window for your filters
20 Oct · 19:40 → 21 Oct · 05:40 Meets your minimum duration.
Times in America/Toronto · approximately 20-minute samples. Geometry only, not a weather forecast.
21 Oct · La Prairie
Waxing gibbous · 82% lit at local midnight.
Astronomical darkness
21 Oct · 19:40 → 22 Oct · 06:00 (10.3h)
Moon below horizon during darkness
2.7h total.
Longest window for your filters
21 Oct · 19:40 → 22 Oct · 06:00 Meets your minimum duration.
Times in America/Toronto · approximately 20-minute samples. Geometry only, not a weather forecast.
22 Oct · La Prairie
Waxing gibbous · 89% lit at local midnight.
Astronomical darkness
22 Oct · 19:40 → 23 Oct · 06:00 (10.3h)
Moon below horizon during darkness
1.3h total.
Longest window for your filters
22 Oct · 19:40 → 23 Oct · 06:00 Meets your minimum duration.
Times in America/Toronto · approximately 20-minute samples. Geometry only, not a weather forecast.
23 Oct · La Prairie
Waxing gibbous · 95% lit at local midnight.
Astronomical darkness
23 Oct · 19:40 → 24 Oct · 06:00 (10.3h)
Moon below horizon during darkness
0.3h total.
Longest window for your filters
23 Oct · 19:40 → 24 Oct · 06:00 Meets your minimum duration.
Times in America/Toronto · approximately 20-minute samples. Geometry only, not a weather forecast.
24 Oct · La Prairie
Waxing gibbous · 98% lit at local midnight.
Astronomical darkness
24 Oct · 19:40 → 25 Oct · 06:00 (10.3h)
Moon below horizon during darkness
0.0h total.
Longest window for your filters
24 Oct · 19:40 → 25 Oct · 06:00 Meets your minimum duration.
Times in America/Toronto · approximately 20-minute samples. Geometry only, not a weather forecast.
25 Oct · La Prairie
Full moon · 100% lit at local midnight.
Astronomical darkness
25 Oct · 19:40 → 26 Oct · 06:00 (10.3h)
Moon below horizon during darkness
0.0h total.
Longest window for your filters
25 Oct · 19:40 → 26 Oct · 06:00 Meets your minimum duration.
Times in America/Toronto · approximately 20-minute samples. Geometry only, not a weather forecast.
26 Oct · La Prairie
Waning gibbous · 99% lit at local midnight.
Astronomical darkness
26 Oct · 19:40 → 27 Oct · 06:00 (10.3h)
Moon below horizon during darkness
0.0h total.
Longest window for your filters
26 Oct · 19:40 → 27 Oct · 06:00 Meets your minimum duration.
Times in America/Toronto · approximately 20-minute samples. Geometry only, not a weather forecast.
27 Oct · La Prairie
Waning gibbous · 95% lit at local midnight.
Astronomical darkness
27 Oct · 19:40 → 28 Oct · 06:00 (10.3h)
Moon below horizon during darkness
0.0h total.
Longest window for your filters
27 Oct · 19:40 → 28 Oct · 06:00 Meets your minimum duration.
Times in America/Toronto · approximately 20-minute samples. Geometry only, not a weather forecast.
28 Oct · La Prairie
Waning gibbous · 89% lit at local midnight.
Astronomical darkness
28 Oct · 19:40 → 29 Oct · 06:00 (10.3h)
Moon below horizon during darkness
0.0h total.
Longest window for your filters
28 Oct · 19:40 → 29 Oct · 06:00 Meets your minimum duration.
Times in America/Toronto · approximately 20-minute samples. Geometry only, not a weather forecast.
29 Oct · La Prairie
Waning gibbous · 80% lit at local midnight.
Astronomical darkness
29 Oct · 19:40 → 30 Oct · 06:00 (10.3h)
Moon below horizon during darkness
0.3h total.
Longest window for your filters
29 Oct · 19:40 → 30 Oct · 06:00 Meets your minimum duration.
Times in America/Toronto · approximately 20-minute samples. Geometry only, not a weather forecast.
30 Oct · La Prairie
Waning gibbous · 70% lit at local midnight.
Astronomical darkness
30 Oct · 19:40 → 31 Oct · 06:00 (10.3h)
Moon below horizon during darkness
1.7h total.
Longest window for your filters
30 Oct · 19:40 → 31 Oct · 06:00 Meets your minimum duration.
Times in America/Toronto · approximately 20-minute samples. Geometry only, not a weather forecast.
31 Oct · La Prairie
Last quarter · 59% lit at local midnight.
Astronomical darkness
31 Oct · 19:40 → 1 Nov · 05:00 (10.3h)
Moon below horizon during darkness
3.0h total.
Longest window for your filters
31 Oct · 19:40 → 1 Nov · 05:00 Meets your minimum duration.
Times in America/Toronto · approximately 20-minute samples. Geometry only, not a weather forecast.
1 Nov · La Prairie
Last quarter · 47% lit at local midnight.
Astronomical darkness
1 Nov · 18:40 → 2 Nov · 05:00 (10.3h)
Moon below horizon during darkness
4.3h total.
Longest window for your filters
1 Nov · 18:40 → 2 Nov · 05:00 Meets your minimum duration.
Times in America/Toronto · approximately 20-minute samples. Geometry only, not a weather forecast.
2 Nov · La Prairie
Waning crescent · 36% lit at local midnight.
Astronomical darkness
2 Nov · 18:40 → 3 Nov · 05:00 (10.3h)
Moon below horizon during darkness
5.7h total.
Longest window for your filters
2 Nov · 18:40 → 3 Nov · 05:00 Meets your minimum duration.
Times in America/Toronto · approximately 20-minute samples. Geometry only, not a weather forecast.
3 Nov · La Prairie
Waning crescent · 25% lit at local midnight.
Astronomical darkness
3 Nov · 18:20 → 4 Nov · 05:00 (10.7h)
Moon below horizon during darkness
7.3h total.
Longest window for your filters
3 Nov · 18:20 → 4 Nov · 05:00 Meets your minimum duration.
Times in America/Toronto · approximately 20-minute samples. Geometry only, not a weather forecast.
4 Nov · La Prairie
Waning crescent · 16% lit at local midnight.
Astronomical darkness
4 Nov · 18:20 → 5 Nov · 05:00 (10.7h)
Moon below horizon during darkness
8.7h total.
Longest window for your filters
4 Nov · 18:20 → 5 Nov · 05:00 Meets your minimum duration.
Times in America/Toronto · approximately 20-minute samples. Geometry only, not a weather forecast.
5 Nov · La Prairie
Waning crescent · 9% lit at local midnight.
Astronomical darkness
5 Nov · 18:20 → 6 Nov · 05:00 (10.7h)
Moon below horizon during darkness
9.7h total.
Longest window for your filters
5 Nov · 18:20 → 6 Nov · 05:00 Meets your minimum duration.
Times in America/Toronto · approximately 20-minute samples. Geometry only, not a weather forecast.
6 Nov · La Prairie
Waning crescent · 4% lit at local midnight.
Astronomical darkness
6 Nov · 18:20 → 7 Nov · 05:20 (11.0h)
Moon below horizon during darkness
11.0h total.
Longest window for your filters
6 Nov · 18:20 → 7 Nov · 05:20 Meets your minimum duration.
Times in America/Toronto · approximately 20-minute samples. Geometry only, not a weather forecast.
7 Nov · La Prairie
Waning crescent · 1% lit at local midnight.
Astronomical darkness
7 Nov · 18:20 → 8 Nov · 05:20 (11.0h)
Moon below horizon during darkness
11.0h total.
Longest window for your filters
7 Nov · 18:20 → 8 Nov · 05:20 Meets your minimum duration.
Times in America/Toronto · approximately 20-minute samples. Geometry only, not a weather forecast.
8 Nov · La Prairie
New moon · 0% lit at local midnight.
Astronomical darkness
8 Nov · 18:20 → 9 Nov · 05:20 (11.0h)
Moon below horizon during darkness
11.0h total.
Longest window for your filters
8 Nov · 18:20 → 9 Nov · 05:20 Meets your minimum duration.
Times in America/Toronto · approximately 20-minute samples. Geometry only, not a weather forecast.
30 nights in a row meeting 4 h with any moon. 30 qualify across the 30.
The usable moonless stretch collapses to nothing around it. A good week for planets, doubles and lunar detail.
The moon moves about 12° east a day, so the dark window shifts roughly fifty minutes later each night. A Friday plan is not a Saturday plan.
Plan somewhere else
Sky geometry only — no weather claims beyond the seven-night forecast. How to plan around the moon →