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 Mont-Mégantic.
19 Sept · Mont-Mégantic
Waxing gibbous · 62% lit at local midnight.
Astronomical darkness
19 Sept · 20:40 → 20 Sept · 05:00 (8.3h)
Moon below horizon during darkness
5.0h total.
Longest window for your filters
20 Sept · 00:00 → 20 Sept · 05:00 Meets your minimum duration.
Times in America/Toronto · approximately 20-minute samples. Geometry only, not a weather forecast.
20 Sept · Mont-Mégantic
Waxing gibbous · 71% lit at local midnight.
Astronomical darkness
20 Sept · 20:40 → 21 Sept · 05:00 (8.3h)
Moon below horizon during darkness
4.0h total.
Longest window for your filters
21 Sept · 01:00 → 21 Sept · 05:00 Meets your minimum duration.
Times in America/Toronto · approximately 20-minute samples. Geometry only, not a weather forecast.
21 Sept · Mont-Mégantic
Waxing gibbous · 80% lit at local midnight.
Astronomical darkness
21 Sept · 20:40 → 22 Sept · 05:00 (8.3h)
Moon below horizon during darkness
3.0h total.
Longest window for your filters
22 Sept · 02:00 → 22 Sept · 05:00 Does not meet your minimum duration.
Times in America/Toronto · approximately 20-minute samples. Geometry only, not a weather forecast.
22 Sept · Mont-Mégantic
Waxing gibbous · 87% lit at local midnight.
Astronomical darkness
22 Sept · 20:40 → 23 Sept · 05:00 (8.3h)
Moon below horizon during darkness
2.0h total.
Longest window for your filters
23 Sept · 03:00 → 23 Sept · 05:00 Does not meet your minimum duration.
Times in America/Toronto · approximately 20-minute samples. Geometry only, not a weather forecast.
23 Sept · Mont-Mégantic
Waxing gibbous · 93% lit at local midnight.
Astronomical darkness
23 Sept · 20:40 → 24 Sept · 05:00 (8.3h)
Moon below horizon during darkness
0.7h total.
Longest window for your filters
24 Sept · 04:20 → 24 Sept · 05:00 Does not meet your minimum duration.
Times in America/Toronto · approximately 20-minute samples. Geometry only, not a weather forecast.
24 Sept · Mont-Mégantic
Waxing gibbous · 97% lit at local midnight.
Astronomical darkness
24 Sept · 20:20 → 25 Sept · 05:00 (8.7h)
Moon below horizon during darkness
0.0h total.
Longest window for your filters
None. Does not meet your minimum duration.
Times in America/Toronto · approximately 20-minute samples. Geometry only, not a weather forecast.
25 Sept · Mont-Mégantic
Full moon · 100% lit at local midnight.
Astronomical darkness
25 Sept · 20:20 → 26 Sept · 05:00 (8.7h)
Moon below horizon during darkness
0.0h total.
Longest window for your filters
None. Does not meet your minimum duration.
Times in America/Toronto · approximately 20-minute samples. Geometry only, not a weather forecast.
26 Sept · Mont-Mégantic
Full moon · 100% lit at local midnight.
Astronomical darkness
26 Sept · 20:20 → 27 Sept · 05:00 (8.7h)
Moon below horizon during darkness
0.0h total.
Longest window for your filters
None. Does not meet your minimum duration.
Times in America/Toronto · approximately 20-minute samples. Geometry only, not a weather forecast.
27 Sept · Mont-Mégantic
Waning gibbous · 98% lit at local midnight.
Astronomical darkness
27 Sept · 20:20 → 28 Sept · 05:00 (8.7h)
Moon below horizon during darkness
0.0h total.
Longest window for your filters
None. Does not meet your minimum duration.
Times in America/Toronto · approximately 20-minute samples. Geometry only, not a weather forecast.
28 Sept · Mont-Mégantic
Waning gibbous · 93% lit at local midnight.
Astronomical darkness
28 Sept · 20:20 → 29 Sept · 05:20 (9.0h)
Moon below horizon during darkness
0.0h total.
Longest window for your filters
None. Does not meet your minimum duration.
Times in America/Toronto · approximately 20-minute samples. Geometry only, not a weather forecast.
29 Sept · Mont-Mégantic
Waning gibbous · 86% lit at local midnight.
Astronomical darkness
29 Sept · 20:20 → 30 Sept · 05:20 (9.0h)
Moon below horizon during darkness
0.0h total.
Longest window for your filters
None. Does not meet your minimum duration.
Times in America/Toronto · approximately 20-minute samples. Geometry only, not a weather forecast.
30 Sept · Mont-Mégantic
Waning gibbous · 77% lit at local midnight.
Astronomical darkness
30 Sept · 20:20 → 1 Oct · 05:20 (9.0h)
Moon below horizon during darkness
0.0h total.
Longest window for your filters
None. Does not meet your minimum duration.
Times in America/Toronto · approximately 20-minute samples. Geometry only, not a weather forecast.
1 Oct · Mont-Mégantic
Waning gibbous · 67% lit at local midnight.
Astronomical darkness
1 Oct · 20:20 → 2 Oct · 05:20 (9.0h)
Moon below horizon during darkness
0.7h total.
Longest window for your filters
1 Oct · 20:20 → 1 Oct · 21:00 Does not meet your minimum duration.
Times in America/Toronto · approximately 20-minute samples. Geometry only, not a weather forecast.
2 Oct · Mont-Mégantic
Last quarter · 55% lit at local midnight.
Astronomical darkness
2 Oct · 20:20 → 3 Oct · 05:20 (9.0h)
Moon below horizon during darkness
1.7h total.
Longest window for your filters
2 Oct · 20:20 → 2 Oct · 22:00 Does not meet your minimum duration.
Times in America/Toronto · approximately 20-minute samples. Geometry only, not a weather forecast.
3 Oct · Mont-Mégantic
Last quarter · 43% lit at local midnight.
Astronomical darkness
3 Oct · 20:20 → 4 Oct · 05:20 (9.0h)
Moon below horizon during darkness
3.0h total.
Longest window for your filters
3 Oct · 20:20 → 3 Oct · 23:20 Does not meet your minimum duration.
Times in America/Toronto · approximately 20-minute samples. Geometry only, not a weather forecast.
4 Oct · Mont-Mégantic
Waning crescent · 32% lit at local midnight.
Astronomical darkness
4 Oct · 20:00 → 5 Oct · 05:20 (9.3h)
Moon below horizon during darkness
4.7h total.
Longest window for your filters
4 Oct · 20:00 → 5 Oct · 00:40 Meets your minimum duration.
Times in America/Toronto · approximately 20-minute samples. Geometry only, not a weather forecast.
5 Oct · Mont-Mégantic
Waning crescent · 22% lit at local midnight.
Astronomical darkness
5 Oct · 20:00 → 6 Oct · 05:20 (9.3h)
Moon below horizon during darkness
6.0h total.
Longest window for your filters
5 Oct · 20:00 → 6 Oct · 02:00 Meets your minimum duration.
Times in America/Toronto · approximately 20-minute samples. Geometry only, not a weather forecast.
6 Oct · Mont-Mégantic
Waning crescent · 13% lit at local midnight.
Astronomical darkness
6 Oct · 20:00 → 7 Oct · 05:20 (9.3h)
Moon below horizon during darkness
7.3h total.
Longest window for your filters
6 Oct · 20:00 → 7 Oct · 03:20 Meets your minimum duration.
Times in America/Toronto · approximately 20-minute samples. Geometry only, not a weather forecast.
7 Oct · Mont-Mégantic
Waning crescent · 6% lit at local midnight.
Astronomical darkness
7 Oct · 20:00 → 8 Oct · 05:20 (9.3h)
Moon below horizon during darkness
8.7h total.
Longest window for your filters
7 Oct · 20:00 → 8 Oct · 04:40 Meets your minimum duration.
Times in America/Toronto · approximately 20-minute samples. Geometry only, not a weather forecast.
8 Oct · Mont-Mégantic
Waning crescent · 2% lit at local midnight.
Astronomical darkness
8 Oct · 20:00 → 9 Oct · 05:20 (9.3h)
Moon below horizon during darkness
9.3h total.
Longest window for your filters
8 Oct · 20:00 → 9 Oct · 05:20 Meets your minimum duration.
Times in America/Toronto · approximately 20-minute samples. Geometry only, not a weather forecast.
9 Oct · Mont-Mégantic
New moon · 0% lit at local midnight.
Astronomical darkness
9 Oct · 20:00 → 10 Oct · 05:20 (9.3h)
Moon below horizon during darkness
9.3h total.
Longest window for your filters
9 Oct · 20:00 → 10 Oct · 05:20 Meets your minimum duration.
Times in America/Toronto · approximately 20-minute samples. Geometry only, not a weather forecast.
10 Oct · Mont-Mégantic
New moon · 1% lit at local midnight.
Astronomical darkness
10 Oct · 20:00 → 11 Oct · 05:20 (9.3h)
Moon below horizon during darkness
9.3h total.
Longest window for your filters
10 Oct · 20:00 → 11 Oct · 05:20 Meets your minimum duration.
Times in America/Toronto · approximately 20-minute samples. Geometry only, not a weather forecast.
11 Oct · Mont-Mégantic
Waxing crescent · 3% lit at local midnight.
Astronomical darkness
11 Oct · 20:00 → 12 Oct · 05:20 (9.3h)
Moon below horizon during darkness
9.3h total.
Longest window for your filters
11 Oct · 20:00 → 12 Oct · 05:20 Meets your minimum duration.
Times in America/Toronto · approximately 20-minute samples. Geometry only, not a weather forecast.
12 Oct · Mont-Mégantic
Waxing crescent · 7% lit at local midnight.
Astronomical darkness
12 Oct · 20:00 → 13 Oct · 05:20 (9.3h)
Moon below horizon during darkness
9.3h total.
Longest window for your filters
12 Oct · 20:00 → 13 Oct · 05:20 Meets your minimum duration.
Times in America/Toronto · approximately 20-minute samples. Geometry only, not a weather forecast.
13 Oct · Mont-Mégantic
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 · Mont-Mégantic
Waxing crescent · 20% lit at local midnight.
Astronomical darkness
14 Oct · 20:00 → 15 Oct · 05:40 (9.7h)
Moon below horizon during darkness
9.7h 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 · Mont-Mégantic
Waxing crescent · 28% lit at local midnight.
Astronomical darkness
15 Oct · 19:40 → 16 Oct · 05:40 (10.0h)
Moon below horizon during darkness
9.0h total.
Longest window for your filters
15 Oct · 20:40 → 16 Oct · 05:40 Meets your minimum duration.
Times in America/Toronto · approximately 20-minute samples. Geometry only, not a weather forecast.
16 Oct · Mont-Mégantic
Waxing crescent · 37% lit at local midnight.
Astronomical darkness
16 Oct · 19:40 → 17 Oct · 05:40 (10.0h)
Moon below horizon during darkness
8.0h total.
Longest window for your filters
16 Oct · 21:40 → 17 Oct · 05:40 Meets your minimum duration.
Times in America/Toronto · approximately 20-minute samples. Geometry only, not a weather forecast.
17 Oct · Mont-Mégantic
First quarter · 46% lit at local midnight.
Astronomical darkness
17 Oct · 19:40 → 18 Oct · 05:40 (10.0h)
Moon below horizon during darkness
7.0h total.
Longest window for your filters
17 Oct · 22:40 → 18 Oct · 05:40 Meets your minimum duration.
Times in America/Toronto · approximately 20-minute samples. Geometry only, not a weather forecast.
18 Oct · Mont-Mégantic
First quarter · 55% lit at local midnight.
Astronomical darkness
18 Oct · 19:40 → 19 Oct · 05:40 (10.0h)
Moon below horizon during darkness
6.0h total.
Longest window for your filters
18 Oct · 23:40 → 19 Oct · 05:40 Meets your minimum duration.
Times in America/Toronto · approximately 20-minute samples. Geometry only, not a weather forecast.
2 nights in a row meeting 4 h with the moon below the horizon. 17 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 →