Rule
Dark Skies
Fairbanks - Dark Skies - Alaska
Fairbanks, 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
Excellent Dark Skies (pristine)
Fairbanks
Wed, Mar 18 · 24:00–05:00 · 5h window
Medium confidence
44%
🌛Moon Altitude-28.5--22.4°
☁️Total Cloud Coverage6.2-18.6%
Pristine Dark Skies (pristine)
Fairbanks
Thu, Mar 19 · 23:03–04:51
🌛Moon Altitude:-14.9--4.4°
Medium
Pristine Dark Skies (pristine)
Fairbanks
Fri, Mar 20 · 23:08–04:46
🌛Moon Altitude:-8.6-5.9°
Low
Pristine Dark Skies (pristine)
Fairbanks
Sat, Mar 21 · 23:12–04:41
🌛Moon Altitude:-2.9-16.1°
Low
Good Dark Skies
Fairbanks
Mon, Mar 23 · 23:22–24:00
🌛Moon Altitude:34.3°
Low
Good Dark Skies
Fairbanks
Tue, Mar 24 · 03:00–04:30
🌛Moon Altitude:8-12°
Low
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72-hour requirements breakdown
What passed or failed, hour by hourOR 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 | ✓ | 69% | 8093m | 0% | 14% | -46° |
| Sun, Mar 15 | ||||||
| 24:00 | ✓ | 85% | 5623m | 0% | 14% | -45° |
| 01:00 | ✓ | 95% | 3688m | 0% | 14% | -42° |
| 02:00 | ✓ | 100% | 2121m | 0% | 14% | -37° |
| 03:00 | ✓ | 100% | 1464m | 0% | 14% | -32° |
| 04:00 | ✓ | 100% | 1321m | 0% | 14% | -26° |
| 05:00 | ✓ | 100% | 1322m | 0% | 14% | -20° |
| 06:00 | ✓ | 100% | 1486m | 0% | 14% | -13° |
| 07:00 | ✕ | 100% | 1402m | 0% | 14% | -7.5° |
| 08:00 | ✕ | 100% | 1706m | 0% | 14% | -2.4° |
| 09:00 | ✕ | 100% | 1824m | 0% | 14% | 1.8° |
| 10:00 | ✕ | 98% | 2373m | 0% | 14% | 4.8° |
| 11:00 | ✕ | 90% | 3633m | 3.6% | 14% | 6.5° |
| 12:00 | ✕ | 97% | 5156m | 3.2% | 14% | 6.6° |
| 13:00 | ✕ | 95% | 10752m | 4.8% | 14% | 5.4° |
| 14:00 | ✕ | 96% | 11534m | 3.2% | 14% | 2.7° |
| 15:00 | ✕ | 91% | 5575m | 1.6% | 14% | -1.2° |
| 16:00 | ✕ | 96% | 1714m | 0% | 7.9% | -6° |
| 17:00 | ✕ | 100% | 975m | 0% | 7.9% | -11° |
| 18:00 | ✕ | 100% | 397m | 0% | 7.9% | -17° |
| 19:00 | ✕ | 100% | 325m | 0% | 7.9% | -23° |
| 20:00 | ✕ | 89% | 5236m | 0% | 7.9% | -29° |
| 21:00 | ✕ | 24% | 10942m | 0% | 7.9% | -34° |
| 22:00 | ✓ | 67% | 24135m | 0% | 7.9% | -38° |
| 23:00 | ✓ | 89% | 24135m | 0% | 7.9% | -40° |
| Mon, Mar 16 | ||||||
| 24:00 | ✓ | 86% | 24135m | 0% | 7.9% | -41° |
| 01:00 | ✓ | 59% | 24135m | 0% | 7.9% | -40° |
| 02:00 | ✓ | 41% | 24135m | 0% | 7.9% | -36° |
| 03:00 | ✓ | 49% | 14474m | 0% | 7.9% | -32° |
| 04:00 | ✓ | 60% | 12603m | 0% | 7.9% | -26° |
| 05:00 | ✓ | 69% | 12219m | 0% | 7.9% | -20° |
| 06:00 | ✕ | 97% | 12715m | 0% | 7.9% | -14° |
| 07:00 | ✕ | 95% | 12704m | 0% | 7.9% | -7.3° |
| 08:00 | ✕ | 53% | 17475m | 0% | 7.9% | -1.5° |
| 09:00 | ✕ | 26% | 18804m | 0% | 7.9% | 3.7° |
| 10:00 | ✕ | 36% | 19171m | 0% | 7.9% | 7.8° |
| 11:00 | ✕ | 58% | 24134m | 0% | 7.9% | 11° |
| 12:00 | ✕ | 91% | 20299m | 0% | 7.9% | 12° |
| 13:00 | ✕ | 98% | 13152m | 0.001% | 7.9% | 12° |
| 14:00 | ✕ | 100% | 9041m | 0% | 7.9% | 10° |
| 15:00 | ✕ | 100% | 7813m | 0% | 7.9% | 7.3° |
| 16:00 | ✕ | 100% | 7055m | 0% | 2.9% | 3.1° |
| 17:00 | ✕ | 100% | 6398m | 0% | 2.9% | -1.9° |
| 18:00 | ✕ | 100% | 7795m | 0% | 2.9% | -7.6° |
| 19:00 | ✕ | 99% | 24135m | 0% | 2.9% | -14° |
| 20:00 | ✕ | 96% | 24135m | 0% | 2.9% | -19° |
| 21:00 | ✕ | 100% | 24134m | 0% | 2.9% | -25° |
| 22:00 | ✓ | 100% | 24135m | 0% | 2.9% | -30° |
| 23:00 | ✓ | 100% | 24135m | 0% | 2.9% | -33° |
| Tue, Mar 17 | ||||||
| 24:00 | ✓ | 100% | 24135m | 0% | 2.9% | -35° |
| 01:00 | ✓ | 100% | 24134m | 0% | 2.9% | -35° |
| 02:00 | ✓ | 100% | 24134m | 0% | 2.9% | -33° |
| 03:00 | ✓ | 100% | 24134m | 0% | 2.9% | -30° |
| 04:00 | ✓ | 100% | 24134m | 0% | 2.9% | -25° |
| 05:00 | ✓ | 100% | 24135m | 0% | 2.9% | -19° |
| 06:00 | ✕ | 100% | 24134m | 0% | 2.9% | -13° |
| 07:00 | ✕ | 100% | 24134m | 0% | 2.9% | -6.6° |
| 08:00 | ✕ | 100% | 24135m | 0% | 2.9% | -0.35° |
| 09:00 | ✕ | 100% | 24135m | 0% | 2.9% | 5.5° |
| 10:00 | ✕ | 100% | 24135m | 0% | 2.9% | 11° |
| 11:00 | ✕ | 100% | 24135m | 0% | 2.9% | 15° |
| 12:00 | ✕ | 100% | 24134m | 0% | 2.9% | 17° |
| 13:00 | ✕ | 100% | 12340m | 0% | 2.9% | 18° |
| 14:00 | ✕ | 100% | 4263m | 0% | 2.9% | 18° |
| 15:00 | ✕ | 100% | 5508m | 0% | 2.9% | 16° |
| 16:00 | ✕ | 100% | 5769m | 0% | 0.4% | 12° |
| 17:00 | ✕ | 100% | 5535m | 0% | 0.4% | 7.9° |
| 18:00 | ✕ | 100% | 5508m | 0% | 0.4% | 2.6° |
| 19:00 | ✕ | 99% | 5718m | 0.001% | 0.4% | -3.2° |
| 20:00 | ✕ | 96% | 7909m | 0% | 0.4% | -9.1° |
| 21:00 | ✕ | 75% | 10537m | 0% | 0.4% | -15° |
| 22:00 | ✓ | 68% | 9322m | 0% | 0.4% | -20° |
| 23:00 | ✓ | 50% | 8770m | 0% | 0.4% | -24° |
| Wed, Mar 18 | ||||||
| 24:00 | ✓ | 17% | 19622m | 0% | 0.4% | -27° |
| 01:00 | ✓ | 10% | 24135m | 0.001% | 0.4% | -29° |
| 02:00 | ✓ | 6.2% | 24134m | 0% | 0.4% | -28° |
| 03:00 | ✓ | 14% | 24135m | 0% | 0.4% | -26° |
| 04:00 | ✓ | 19% | 23718m | 0% | 0.4% | -22° |
| 05:00 | ✓ | 32% | 23857m | 0% | 0.4% | -18° |
| 06:00 | ✕ | 45% | 23996m | 0% | 0.4% | -12° |
| 07:00 | ✕ | 58% | 24135m | 0% | 0.4% | -5.6° |
| 08:00 | ✕ | 72% | 23589m | 0% | 0.4% | 0.86° |
| 09:00 | ✕ | 86% | 23044m | 0% | 0.4% | 7.1° |
| 10:00 | ✕ | 100% | 22498m | 0% | 0.4% | 13° |
| 11:00 | ✕ | 95% | 16689m | 0% | 0.4% | 18° |
| 12:00 | ✕ | 89% | 10880m | 0% | 0.4% | 22° |
| 13:00 | ✕ | 84% | 5071m | 0% | 0.4% | 24° |
| 14:00 | ✕ | 84% | 5058m | 0% | 0.4% | 25° |
| 15:00 | ✕ | 84% | 5044m | 0% | 0.4% | 24° |
| 16:00 | ✕ | 84% | 5031m | 0% | 0.2% | 22° |
| 17:00 | ✕ | 77% | 5103m | 0% | 0.2% | 18° |
| 18:00 | ✕ | 71% | 5176m | 0% | 0.2% | 13° |
| 19:00 | ✕ | 65% | 5249m | 0% | 0.2% | 7.5° |
| 20:00 | ✕ | 77% | 11544m | 0% | 0.2% | 1.6° |
| 21:00 | ✕ | 88% | 17840m | 0% | 0.2% | -4.2° |
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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