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
Good Dark Skies at Dawn
Fairbanks
Tomorrow · 06:00–07:00 · 1h window
Medium confidence
56%
🌛Moon Altitude8.8°
☁️Total Cloud Coverage19.5%
Pristine Dark Skies (pristine)
Fairbanks
Tomorrow · 09:00–19:00
🌛Moon Altitude:-34.1--9.2°
Medium
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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° |
|---|---|---|---|---|---|---|
| Tue, Mar 3 | ||||||
| 16:00 | ✕ | 11% | 23835m | 0% | 99% | -17° |
| 17:00 | ✕ | 5% | 24134m | 0% | 99% | -12° |
| 18:00 | ✕ | 5% | 24135m | 0% | 99% | -7.1° |
| 19:00 | ✕ | 5% | 24134m | 0% | 99% | -1.4° |
| 20:00 | ✕ | 40% | 24134m | 0% | 99% | 4.5° |
| 21:00 | ✓ | 46% | 24134m | 0% | 99% | 10° |
| 22:00 | ✓ | 5% | 24135m | 0% | 99% | 16° |
| 23:00 | ✓ | 12% | 24135m | 0% | 99% | 20° |
| Wed, Mar 4 | ||||||
| 24:00 | ✓ | 6.4% | 24134m | 0% | 99% | 23° |
| 01:00 | ✓ | 5.8% | 24135m | 0% | 99% | 25° |
| 02:00 | ✓ | 6.3% | 24134m | 0% | 99% | 25° |
| 03:00 | ✓ | 6.2% | 24134m | 0% | 99% | 24° |
| 04:00 | ✓ | 5.5% | 24134m | 0% | 99% | 21° |
| 05:00 | ✓ | 8% | 24134m | 0% | 99% | 16° |
| 06:00 | ✓ | 12% | 24135m | 0% | 99% | 11° |
| 07:00 | ✓ | 14% | 24135m | 0% | 99% | 4.6° |
| 08:00 | ✓ | 17% | 24135m | 0% | 99% | -1.7° |
| 09:00 | ✓ | 11% | 24135m | 0% | 99% | -8.1° |
| 10:00 | ✓ | 5% | 24135m | 0% | 99% | -14° |
| 11:00 | ✓ | 5% | 24134m | 0% | 99% | -19° |
| 12:00 | ✓ | 5% | 24134m | 0% | 99% | -24° |
| 13:00 | ✓ | 6% | 24135m | 0% | 99% | -27° |
| 14:00 | ✓ | 18% | 24135m | 0% | 99% | -28° |
| 15:00 | ✕ | 98% | 24134m | 0% | 96% | -27° |
| 16:00 | ✕ | 62% | 24135m | 0% | 96% | -25° |
| 17:00 | ✕ | 100% | 24134m | 0% | 96% | -22° |
| 18:00 | ✕ | 100% | 24134m | 0% | 96% | -17° |
| 19:00 | ✕ | 100% | 24134m | 0% | 96% | -11° |
| 20:00 | ✕ | 100% | 24135m | 0% | 96% | -5.5° |
| 21:00 | ✓ | 100% | 24134m | 0% | 96% | 0.44° |
| 22:00 | ✓ | 99% | 15561m | 0% | 96% | 6.1° |
| 23:00 | ✓ | 50% | 17094m | 0% | 96% | 11° |
| Thu, Mar 5 | ||||||
| 24:00 | ✓ | 29% | 16042m | 0% | 96% | 15° |
| 01:00 | ✓ | 29% | 14225m | 0% | 96% | 18° |
| 02:00 | ✓ | 31% | 13871m | 0% | 96% | 19° |
| 03:00 | ✓ | 27% | 15631m | 0% | 96% | 19° |
| 04:00 | ✓ | 22% | 23332m | 0% | 96% | 17° |
| 05:00 | ✓ | 19% | 24134m | 0% | 96% | 13° |
| 06:00 | ✓ | 20% | 24134m | 0% | 96% | 8.8° |
| 07:00 | ✓ | 21% | 24135m | 0% | 96% | 3.3° |
| 08:00 | ✓ | 22% | 24135m | 0% | 96% | -2.8° |
| 09:00 | ✓ | 7.5% | 24135m | 0% | 96% | -9.2° |
| 10:00 | ✓ | 4.5% | 24134m | 0% | 96% | -16° |
| 11:00 | ✓ | 4.5% | 24134m | 0% | 96% | -21° |
| 12:00 | ✓ | 0.7% | 24134m | 0% | 96% | -27° |
| 13:00 | ✓ | 0.1% | 24134m | 0% | 96% | -31° |
| 14:00 | ✓ | 0.5% | 24135m | 0% | 96% | -33° |
| 15:00 | ✓ | 1.5% | 24134m | 0% | 90% | -34° |
| 16:00 | ✓ | 1.5% | 24135m | 0% | 90% | -33° |
| 17:00 | ✓ | 5% | 24135m | 0% | 90% | -30° |
| 18:00 | ✓ | 5% | 24134m | 0% | 90% | -26° |
| 19:00 | ✓ | 40% | 24134m | 0% | 90% | -21° |
| 20:00 | ✓ | 90% | 24134m | 0% | 90% | -15° |
| 21:00 | ✓ | 91% | 24135m | 0% | 90% | -9.2° |
| 22:00 | ✓ | 100% | 24134m | 0% | 90% | -3.4° |
| 23:00 | ✓ | 100% | 24135m | 0% | 90% | 2° |
| Fri, Mar 6 | ||||||
| 24:00 | ✓ | 100% | 24134m | 0% | 90% | 6.7° |
| 01:00 | ✓ | 100% | 24134m | 17% | 90% | 10° |
| 02:00 | ✓ | 100% | 24135m | 33% | 90% | 13° |
| 03:00 | ✓ | 100% | 24134m | 50% | 90% | 13° |
| 04:00 | ✓ | 100% | 24134m | 55% | 90% | 13° |
| 05:00 | ✓ | 100% | 24135m | 60% | 90% | 10° |
| 06:00 | ✓ | 100% | 24134m | 65% | 90% | 6.6° |
| 07:00 | ✓ | 100% | 24134m | 54% | 90% | 1.9° |
| 08:00 | ✓ | 100% | 24134m | 42% | 90% | -3.7° |
| 09:00 | ✓ | 100% | 24135m | 31% | 90% | -9.8° |
| 10:00 | ✓ | 100% | 23303m | 52% | 90% | -16° |
| 11:00 | ✓ | 100% | 3846m | 73% | 90% | -23° |
| 12:00 | ✓ | 100% | 468m | 95% | 90% | -28° |
| 13:00 | ✓ | 100% | 179m | 96% | 90% | -33° |
| 14:00 | ✓ | 100% | 1721m | 97% | 90% | -37° |
| 15:00 | ✓ | 100% | 2146m | 99% | 84% | -39° |
| 16:00 | ✓ | 100% | 518m | 96% | 84% | -40° |
| 17:00 | ✓ | 100% | 1329m | 93% | 84% | -38° |
| 18:00 | ✓ | 100% | 498m | 91% | 84% | -35° |
| 19:00 | ✓ | 100% | 183m | 93% | 84% | -30° |
| 20:00 | ✓ | 100% | 122m | 95% | 84% | -24° |
| 21:00 | ✓ | 100% | 130m | 98% | 84% | -18° |
| 22:00 | ✓ | 100% | 211m | 93% | 84% | -13° |
| 23:00 | ✓ | 100% | 292m | 87% | 84% | -6.8° |
| Sat, Mar 7 | ||||||
| 24:00 | ✓ | 100% | 374m | 82% | 84% | -1.7° |
| 01:00 | ✓ | 100% | 338m | 88% | 84% | 2.6° |
| 02:00 | ✓ | 100% | 302m | 93% | 84% | 5.8° |
| 03:00 | ✓ | 100% | 267m | 99% | 84% | 7.6° |
| 04:00 | ✓ | 100% | 347m | 93% | 84% | 8° |
| 05:00 | ✓ | 100% | 428m | 87% | 84% | 6.9° |
| 06:00 | ✓ | 100% | 509m | 82% | 84% | 4.3° |
| 07:00 | ✓ | 100% | 437m | 85% | 84% | 0.49° |
| 08:00 | ✓ | 100% | 364m | 88% | 84% | -4.4° |
| 09:00 | ✓ | 100% | 292m | 92% | 84% | -10° |
| 10:00 | ✓ | 100% | 339m | 88% | 84% | -16° |
| 11:00 | ✓ | 100% | 387m | 85% | 84% | -22° |
| 12:00 | ✓ | 100% | 435m | 82% | 84% | -29° |
| 13:00 | ✓ | 100% | 730m | 82% | 84% | -34° |
| 14:00 | ✓ | 100% | 1026m | 82% | 84% | -39° |
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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