Rule
Dark Skies
Anchorage - Dark Skies - Alaska
Anchorage, Alaska, United States
Moonless nights with crystal-clear skies for deep-sky photography
Upcoming Opportunities
When all conditions match, PhotoWeather marks an opportunity window.
Times shown in America/Anchorage
Next opportunity
Good Dark Skies
Anchorage
Sat, Mar 21 · 04:00–05:00 · 1h window
Medium confidence
44%
🌛Moon Altitude-12.2°
☁️Total Cloud Coverage18.7%
Good Dark Skies
Anchorage
Sun, Mar 22 · 04:00–05:19
🌛Moon Altitude:-6.8--6.2°
Low
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72-hour requirements breakdown
What passed or failed, hour by hour0matching hours in the next 95 hours
OR logic: one branch per group is enough
Meets requirement
Misses requirement
Time America/Anchorage | Astronomical Night Any | Total Cloud Coverage ≤ 20.0% | Visibility ≥ 12000.0m | Precipitation Chance ≤ 10.0% | Moon Illumination OR1·B1≤ 35.0% | Moon Altitude OR1·B2≤ 10.0° |
|---|---|---|---|---|---|---|
| Sat, Mar 14 | ||||||
| 23:00 | ✓ | 100% | 1356m | 83% | 14% | -50° |
| Sun, Mar 15 | ||||||
| 24:00 | ✓ | 100% | 789m | 59% | 14% | -49° |
| 01:00 | ✓ | 100% | 709m | 39% | 14% | -45° |
| 02:00 | ✓ | 100% | 817m | 53% | 14% | -40° |
| 03:00 | ✓ | 100% | 1090m | 68% | 14% | -34° |
| 04:00 | ✓ | 100% | 1035m | 82% | 14% | -27° |
| 05:00 | ✓ | 100% | 3726m | 26% | 14% | -20° |
| 06:00 | ✓ | 100% | 1253m | 13% | 14% | -13° |
| 07:00 | ✕ | 100% | 832m | 0% | 14% | -6.6° |
| 08:00 | ✕ | 100% | 1102m | 13% | 14% | -0.69° |
| 09:00 | ✕ | 100% | 1679m | 26% | 14% | 4.2° |
| 10:00 | ✕ | 100% | 3224m | 39% | 14% | 7.8° |
| 11:00 | ✕ | 100% | 3402m | 53% | 14% | 9.9° |
| 12:00 | ✕ | 69% | 10432m | 52% | 14% | 10° |
| 13:00 | ✕ | 86% | 11562m | 78% | 14% | 9.1° |
| 14:00 | ✕ | 99% | 5998m | 79% | 14% | 6.3° |
| 15:00 | ✕ | 100% | 4537m | 80% | 14% | 2° |
| 16:00 | ✕ | 100% | 3615m | 82% | 7.9% | -3.3° |
| 17:00 | ✕ | 100% | 1671m | 55% | 7.9% | -9.4° |
| 18:00 | ✕ | 100% | 8968m | 33% | 7.9% | -16° |
| 19:00 | ✕ | 100% | 9594m | 0.44% | 7.9% | -23° |
| 20:00 | ✕ | 99% | 10813m | 0.29% | 7.9% | -29° |
| 21:00 | ✕ | 97% | 24135m | 0.15% | 7.9% | -35° |
| 22:00 | ✓ | 100% | 24135m | 0% | 7.9% | -40° |
| 23:00 | ✓ | 100% | 23141m | 0% | 7.9% | -44° |
| Mon, Mar 16 | ||||||
| 24:00 | ✓ | 100% | 20414m | 0% | 7.9% | -45° |
| 01:00 | ✓ | 94% | 24135m | 0% | 7.9% | -43° |
| 02:00 | ✓ | 93% | 24135m | 0% | 7.9% | -40° |
| 03:00 | ✓ | 100% | 24135m | 0% | 7.9% | -35° |
| 04:00 | ✓ | 100% | 24135m | 0% | 7.9% | -28° |
| 05:00 | ✓ | 100% | 24134m | 0% | 7.9% | -21° |
| 06:00 | ✕ | 86% | 24135m | 0% | 7.9% | -14° |
| 07:00 | ✕ | 100% | 24134m | 0.001% | 7.9% | -7.2° |
| 08:00 | ✕ | 95% | 24134m | 0% | 7.9% | -0.51° |
| 09:00 | ✕ | 100% | 24134m | 0% | 7.9% | 5.4° |
| 10:00 | ✕ | 100% | 24134m | 0% | 7.9% | 10° |
| 11:00 | ✕ | 100% | 24134m | 10% | 7.9% | 14° |
| 12:00 | ✕ | 100% | 24135m | 21% | 7.9% | 16° |
| 13:00 | ✕ | 100% | 24134m | 31% | 7.9% | 16° |
| 14:00 | ✕ | 100% | 24134m | 34% | 7.9% | 14° |
| 15:00 | ✕ | 99% | 24134m | 36% | 7.9% | 11° |
| 16:00 | ✕ | 85% | 24134m | 39% | 2.9% | 6.1° |
| 17:00 | ✕ | 92% | 24134m | 26% | 2.9% | 0.49° |
| 18:00 | ✕ | 96% | 24135m | 13% | 2.9% | -5.9° |
| 19:00 | ✕ | 99% | 24135m | 0% | 2.9% | -13° |
| 20:00 | ✕ | 100% | 24135m | 0% | 2.9% | -19° |
| 21:00 | ✕ | 96% | 24134m | 0% | 2.9% | -26° |
| 22:00 | ✓ | 98% | 24135m | 0% | 2.9% | -31° |
| 23:00 | ✓ | 82% | 24135m | 0% | 2.9% | -36° |
| Tue, Mar 17 | ||||||
| 24:00 | ✓ | 79% | 24135m | 0% | 2.9% | -38° |
| 01:00 | ✓ | 99% | 24134m | 0% | 2.9% | -39° |
| 02:00 | ✓ | 100% | 24134m | 0% | 2.9% | -37° |
| 03:00 | ✓ | 100% | 24134m | 0% | 2.9% | -33° |
| 04:00 | ✓ | 100% | 24134m | 0% | 2.9% | -28° |
| 05:00 | ✓ | 100% | 24135m | 2.3% | 2.9% | -21° |
| 06:00 | ✕ | 100% | 24134m | 4.7% | 2.9% | -15° |
| 07:00 | ✕ | 100% | 24134m | 7% | 2.9% | -7.3° |
| 08:00 | ✕ | 100% | 24135m | 18% | 2.9% | -0.21° |
| 09:00 | ✕ | 100% | 24135m | 28% | 2.9% | 6.5° |
| 10:00 | ✕ | 100% | 16963m | 39% | 2.9% | 12° |
| 11:00 | ✕ | 100% | 11600m | 39% | 2.9% | 17° |
| 12:00 | ✕ | 100% | 9718m | 39% | 2.9% | 20° |
| 13:00 | ✕ | 100% | 3469m | 39% | 2.9% | 22° |
| 14:00 | ✕ | 100% | 864m | 45% | 2.9% | 22° |
| 15:00 | ✕ | 100% | 620m | 50% | 2.9% | 20° |
| 16:00 | ✕ | 100% | 809m | 56% | 0.4% | 16° |
| 17:00 | ✕ | 100% | 1157m | 40% | 0.4% | 11° |
| 18:00 | ✕ | 100% | 1796m | 25% | 0.4% | 4.8° |
| 19:00 | ✕ | 100% | 2516m | 9.3% | 0.4% | -1.8° |
| 20:00 | ✕ | 100% | 3264m | 6.2% | 0.4% | -8.5° |
| 21:00 | ✕ | 100% | 3474m | 3.1% | 0.4% | -15° |
| 22:00 | ✓ | 100% | 10426m | 0% | 0.4% | -21° |
| 23:00 | ✓ | 100% | 13157m | 0% | 0.4% | -26° |
| Wed, Mar 18 | ||||||
| 24:00 | ✓ | 100% | 17148m | 0% | 0.4% | -30° |
| 01:00 | ✓ | 100% | 23263m | 0% | 0.4% | -32° |
| 02:00 | ✓ | 100% | 24134m | 0% | 0.4% | -32° |
| 03:00 | ✓ | 100% | 24135m | 0% | 0.4% | -30° |
| 04:00 | ✓ | 100% | 24135m | 0% | 0.4% | -26° |
| 05:00 | ✓ | 100% | 24135m | 0% | 0.4% | -20° |
| 06:00 | ✕ | 100% | 24135m | 0% | 0.4% | -14° |
| 07:00 | ✕ | 100% | 24135m | 0% | 0.4% | -7° |
| 08:00 | ✕ | 100% | 23046m | 0% | 0.4% | 0.17° |
| 09:00 | ✕ | 100% | 21957m | 0% | 0.4% | 7.3° |
| 10:00 | ✕ | 100% | 20868m | 0% | 0.4% | 14° |
| 11:00 | ✕ | 100% | 16209m | 0% | 0.4% | 20° |
| 12:00 | ✕ | 99% | 11550m | 0% | 0.4% | 25° |
| 13:00 | ✕ | 99% | 6891m | 0% | 0.4% | 28° |
| 14:00 | ✕ | 99% | 9182m | 7.4% | 0.4% | 29° |
| 15:00 | ✕ | 100% | 11473m | 15% | 0.4% | 28° |
| 16:00 | ✕ | 100% | 13764m | 22% | 0.2% | 25° |
| 17:00 | ✕ | 100% | 12406m | 15% | 0.2% | 21° |
| 18:00 | ✕ | 100% | 11049m | 7.4% | 0.2% | 16° |
| 19:00 | ✕ | 100% | 9691m | 0% | 0.2% | 9.3° |
| 20:00 | ✕ | 100% | 10534m | 7.4% | 0.2% | 2.7° |
| 21:00 | ✕ | 100% | 11377m | 15% | 0.2% | -4.1° |
How to read: colored cells show whether each predicate requirement is met; highlighted rows mean the full rule matched (an opportunity). For OR groups, only one branch is required, so some OR-branch predicates can be ✕ even in a matching hour.
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