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 West Whittier-Los Nietos.
Dark windows over the next 30 nights
Window length in hours · same 0–24 hour scale · geometry, not weather
3 Nov · West Whittier-Los Nietos
Waning crescent · 24% lit at local midnight.
Astronomical darkness
3 Nov · 18:40 → 4 Nov · 05:00 (10.3h)
Moon below horizon during darkness
7.3h total.
Longest window for your filters
3 Nov · 18:40 → 4 Nov · 05:00 Meets your minimum duration.
Times in America/Los_Angeles · approximately 20-minute samples. Geometry only, not a weather forecast.
4 Nov · West Whittier-Los Nietos
Waning crescent · 15% lit at local midnight.
Astronomical darkness
4 Nov · 18:40 → 5 Nov · 05:00 (10.3h)
Moon below horizon during darkness
8.3h total.
Longest window for your filters
4 Nov · 18:40 → 5 Nov · 05:00 Meets your minimum duration.
Times in America/Los_Angeles · approximately 20-minute samples. Geometry only, not a weather forecast.
5 Nov · West Whittier-Los Nietos
Waning crescent · 8% lit at local midnight.
Astronomical darkness
5 Nov · 18:40 → 6 Nov · 05:00 (10.3h)
Moon below horizon during darkness
9.3h total.
Longest window for your filters
5 Nov · 18:40 → 6 Nov · 05:00 Meets your minimum duration.
Times in America/Los_Angeles · approximately 20-minute samples. Geometry only, not a weather forecast.
6 Nov · West Whittier-Los Nietos
Waning crescent · 4% lit at local midnight.
Astronomical darkness
6 Nov · 18:40 → 7 Nov · 05:00 (10.3h)
Moon below horizon during darkness
10.3h total.
Longest window for your filters
6 Nov · 18:40 → 7 Nov · 05:00 Meets your minimum duration.
Times in America/Los_Angeles · approximately 20-minute samples. Geometry only, not a weather forecast.
7 Nov · West Whittier-Los Nietos
New moon · 1% lit at local midnight.
Astronomical darkness
7 Nov · 18:40 → 8 Nov · 05:00 (10.3h)
Moon below horizon during darkness
10.3h total.
Longest window for your filters
7 Nov · 18:40 → 8 Nov · 05:00 Meets your minimum duration.
Times in America/Los_Angeles · approximately 20-minute samples. Geometry only, not a weather forecast.
8 Nov · West Whittier-Los Nietos
New moon · 0% lit at local midnight.
Astronomical darkness
8 Nov · 18:20 → 9 Nov · 05:00 (10.7h)
Moon below horizon during darkness
10.7h total.
Longest window for your filters
8 Nov · 18:20 → 9 Nov · 05:00 Meets your minimum duration.
Times in America/Los_Angeles · approximately 20-minute samples. Geometry only, not a weather forecast.
9 Nov · West Whittier-Los Nietos
Waxing crescent · 2% lit at local midnight.
Astronomical darkness
9 Nov · 18:20 → 10 Nov · 05:00 (10.7h)
Moon below horizon during darkness
10.7h total.
Longest window for your filters
9 Nov · 18:20 → 10 Nov · 05:00 Meets your minimum duration.
Times in America/Los_Angeles · approximately 20-minute samples. Geometry only, not a weather forecast.
10 Nov · West Whittier-Los Nietos
Waxing crescent · 5% lit at local midnight.
Astronomical darkness
10 Nov · 18:20 → 11 Nov · 05:00 (10.7h)
Moon below horizon during darkness
10.7h total.
Longest window for your filters
10 Nov · 18:20 → 11 Nov · 05:00 Meets your minimum duration.
Times in America/Los_Angeles · approximately 20-minute samples. Geometry only, not a weather forecast.
11 Nov · West Whittier-Los Nietos
Waxing crescent · 9% lit at local midnight.
Astronomical darkness
11 Nov · 18:20 → 12 Nov · 05:00 (10.7h)
Moon below horizon during darkness
10.3h total.
Longest window for your filters
11 Nov · 18:20 → 12 Nov · 05:00 Meets your minimum duration.
Times in America/Los_Angeles · approximately 20-minute samples. Geometry only, not a weather forecast.
12 Nov · West Whittier-Los Nietos
Waxing crescent · 15% lit at local midnight.
Astronomical darkness
12 Nov · 18:20 → 13 Nov · 05:00 (10.7h)
Moon below horizon during darkness
9.3h total.
Longest window for your filters
12 Nov · 18:20 → 13 Nov · 05:00 Meets your minimum duration.
Times in America/Los_Angeles · approximately 20-minute samples. Geometry only, not a weather forecast.
13 Nov · West Whittier-Los Nietos
Waxing crescent · 22% lit at local midnight.
Astronomical darkness
13 Nov · 18:20 → 14 Nov · 05:00 (10.7h)
Moon below horizon during darkness
8.3h total.
Longest window for your filters
13 Nov · 18:20 → 14 Nov · 05:00 Meets your minimum duration.
Times in America/Los_Angeles · approximately 20-minute samples. Geometry only, not a weather forecast.
14 Nov · West Whittier-Los Nietos
Waxing crescent · 31% lit at local midnight.
Astronomical darkness
14 Nov · 18:20 → 15 Nov · 05:00 (10.7h)
Moon below horizon during darkness
7.7h total.
Longest window for your filters
14 Nov · 21:20 → 15 Nov · 05:00 Meets your minimum duration.
Times in America/Los_Angeles · approximately 20-minute samples. Geometry only, not a weather forecast.
15 Nov · West Whittier-Los Nietos
First quarter · 40% lit at local midnight.
Astronomical darkness
15 Nov · 18:20 → 16 Nov · 05:00 (10.7h)
Moon below horizon during darkness
6.7h total.
Longest window for your filters
15 Nov · 22:20 → 16 Nov · 05:00 Meets your minimum duration.
Times in America/Los_Angeles · approximately 20-minute samples. Geometry only, not a weather forecast.
16 Nov · West Whittier-Los Nietos
First quarter · 50% lit at local midnight.
Astronomical darkness
16 Nov · 18:20 → 17 Nov · 05:20 (11.0h)
Moon below horizon during darkness
6.0h total.
Longest window for your filters
16 Nov · 23:20 → 17 Nov · 05:20 Meets your minimum duration.
Times in America/Los_Angeles · approximately 20-minute samples. Geometry only, not a weather forecast.
17 Nov · West Whittier-Los Nietos
First quarter · 59% lit at local midnight.
Astronomical darkness
17 Nov · 18:20 → 18 Nov · 05:20 (11.0h)
Moon below horizon during darkness
5.0h total.
Longest window for your filters
18 Nov · 00:20 → 18 Nov · 05:20 Meets your minimum duration.
Times in America/Los_Angeles · approximately 20-minute samples. Geometry only, not a weather forecast.
18 Nov · West Whittier-Los Nietos
Waxing gibbous · 69% lit at local midnight.
Astronomical darkness
18 Nov · 18:20 → 19 Nov · 05:20 (11.0h)
Moon below horizon during darkness
4.0h total.
Longest window for your filters
19 Nov · 01:20 → 19 Nov · 05:20 Meets your minimum duration.
Times in America/Los_Angeles · approximately 20-minute samples. Geometry only, not a weather forecast.
19 Nov · West Whittier-Los Nietos
Waxing gibbous · 78% lit at local midnight.
Astronomical darkness
19 Nov · 18:20 → 20 Nov · 05:20 (11.0h)
Moon below horizon during darkness
3.0h total.
Longest window for your filters
20 Nov · 02:20 → 20 Nov · 05:20 Does not meet your minimum duration.
Times in America/Los_Angeles · approximately 20-minute samples. Geometry only, not a weather forecast.
20 Nov · West Whittier-Los Nietos
Waxing gibbous · 86% lit at local midnight.
Astronomical darkness
20 Nov · 18:20 → 21 Nov · 05:20 (11.0h)
Moon below horizon during darkness
1.7h total.
Longest window for your filters
21 Nov · 03:40 → 21 Nov · 05:20 Does not meet your minimum duration.
Times in America/Los_Angeles · approximately 20-minute samples. Geometry only, not a weather forecast.
21 Nov · West Whittier-Los Nietos
Waxing gibbous · 93% lit at local midnight.
Astronomical darkness
21 Nov · 18:20 → 22 Nov · 05:20 (11.0h)
Moon below horizon during darkness
0.7h total.
Longest window for your filters
22 Nov · 04:40 → 22 Nov · 05:20 Does not meet your minimum duration.
Times in America/Los_Angeles · approximately 20-minute samples. Geometry only, not a weather forecast.
22 Nov · West Whittier-Los Nietos
Waxing gibbous · 98% lit at local midnight.
Astronomical darkness
22 Nov · 18:20 → 23 Nov · 05:20 (11.0h)
Moon below horizon during darkness
0.0h total.
Longest window for your filters
None. Does not meet your minimum duration.
Times in America/Los_Angeles · approximately 20-minute samples. Geometry only, not a weather forecast.
23 Nov · West Whittier-Los Nietos
Full moon · 100% lit at local midnight.
Astronomical darkness
23 Nov · 18:20 → 24 Nov · 05:20 (11.0h)
Moon below horizon during darkness
0.0h total.
Longest window for your filters
None. Does not meet your minimum duration.
Times in America/Los_Angeles · approximately 20-minute samples. Geometry only, not a weather forecast.
24 Nov · West Whittier-Los Nietos
Full moon · 99% lit at local midnight.
Astronomical darkness
24 Nov · 18:20 → 25 Nov · 05:20 (11.0h)
Moon below horizon during darkness
0.0h total.
Longest window for your filters
None. Does not meet your minimum duration.
Times in America/Los_Angeles · approximately 20-minute samples. Geometry only, not a weather forecast.
25 Nov · West Whittier-Los Nietos
Waning gibbous · 96% lit at local midnight.
Astronomical darkness
25 Nov · 18:20 → 26 Nov · 05:20 (11.0h)
Moon below horizon during darkness
0.0h total.
Longest window for your filters
None. Does not meet your minimum duration.
Times in America/Los_Angeles · approximately 20-minute samples. Geometry only, not a weather forecast.
26 Nov · West Whittier-Los Nietos
Waning gibbous · 90% lit at local midnight.
Astronomical darkness
26 Nov · 18:20 → 27 Nov · 05:20 (11.0h)
Moon below horizon during darkness
0.7h total.
Longest window for your filters
26 Nov · 18:20 → 26 Nov · 19:00 Does not meet your minimum duration.
Times in America/Los_Angeles · approximately 20-minute samples. Geometry only, not a weather forecast.
27 Nov · West Whittier-Los Nietos
Waning gibbous · 82% lit at local midnight.
Astronomical darkness
27 Nov · 18:20 → 28 Nov · 05:20 (11.0h)
Moon below horizon during darkness
1.7h total.
Longest window for your filters
27 Nov · 18:20 → 27 Nov · 20:00 Does not meet your minimum duration.
Times in America/Los_Angeles · approximately 20-minute samples. Geometry only, not a weather forecast.
28 Nov · West Whittier-Los Nietos
Waning gibbous · 73% lit at local midnight.
Astronomical darkness
28 Nov · 18:20 → 29 Nov · 05:20 (11.0h)
Moon below horizon during darkness
3.0h total.
Longest window for your filters
28 Nov · 18:20 → 28 Nov · 21:20 Does not meet your minimum duration.
Times in America/Los_Angeles · approximately 20-minute samples. Geometry only, not a weather forecast.
29 Nov · West Whittier-Los Nietos
Waning gibbous · 62% lit at local midnight.
Astronomical darkness
29 Nov · 18:20 → 30 Nov · 05:20 (11.0h)
Moon below horizon during darkness
4.0h total.
Longest window for your filters
29 Nov · 18:20 → 29 Nov · 22:20 Meets your minimum duration.
Times in America/Los_Angeles · approximately 20-minute samples. Geometry only, not a weather forecast.
30 Nov · West Whittier-Los Nietos
Last quarter · 50% lit at local midnight.
Astronomical darkness
30 Nov · 18:20 → 1 Dec · 05:20 (11.0h)
Moon below horizon during darkness
5.3h total.
Longest window for your filters
30 Nov · 18:20 → 30 Nov · 23:40 Meets your minimum duration.
Times in America/Los_Angeles · approximately 20-minute samples. Geometry only, not a weather forecast.
1 Dec · West Whittier-Los Nietos
Waning crescent · 39% lit at local midnight.
Astronomical darkness
1 Dec · 18:20 → 2 Dec · 05:20 (11.0h)
Moon below horizon during darkness
6.3h total.
Longest window for your filters
1 Dec · 18:20 → 2 Dec · 00:40 Meets your minimum duration.
Times in America/Los_Angeles · approximately 20-minute samples. Geometry only, not a weather forecast.
2 Dec · West Whittier-Los Nietos
Waning crescent · 29% lit at local midnight.
Astronomical darkness
2 Dec · 18:20 → 3 Dec · 05:20 (11.0h)
Moon below horizon during darkness
7.3h total.
Longest window for your filters
2 Dec · 18:20 → 3 Dec · 01:40 Meets your minimum duration.
Times in America/Los_Angeles · approximately 20-minute samples. Geometry only, not a weather forecast.
16 nights in a row meeting 4 h with under 25% illumination. 20 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 →