Rule
Dark Skies
Mývatn - Dark Skies - Iceland
Reykjahlíð, Northeast, Iceland
Moonless nights with crystal-clear skies for deep-sky photography
Upcoming Opportunities
When all conditions match, PhotoWeather marks an opportunity window.
Times shown in Atlantic/Reykjavik
Next opportunity
Excellent Dark Skies (pristine)
Mývatn
Fri, Mar 20 · 03:00–04:03 · 1h window
Low confidence
35%
🌛Moon Altitude-15.5--13°
☁️Total Cloud Coverage6.7-7.5%
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72-hour requirements breakdown
What passed or failed, hour by hour0matching hours in the next 80 hours
OR logic: one branch per group is enough
Meets requirement
Misses requirement
Time Atlantic/Reykjavik | 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° |
|---|---|---|---|---|---|---|
| Sun, Mar 15 | ||||||
| 04:00 | ✕ | 100% | 2469m | 77% | 14% | -21° |
| 05:00 | ✕ | 100% | 4693m | 84% | 14% | -15° |
| 06:00 | ✕ | 100% | 24134m | 92% | 14% | -9.4° |
| 07:00 | ✕ | 100% | 15753m | 96% | 14% | -4.5° |
| 08:00 | ✕ | 100% | 22855m | 98% | 14% | -0.47° |
| 09:00 | ✕ | 100% | 22242m | 99% | 14% | 2.4° |
| 10:00 | ✕ | 100% | 6449m | 100% | 14% | 3.9° |
| 11:00 | ✕ | 100% | 986m | 100% | 14% | 4.1° |
| 12:00 | ✕ | 100% | 706m | 100% | 14% | 2.8° |
| 13:00 | ✕ | 100% | 1135m | 100% | 14% | 0.26° |
| 14:00 | ✕ | 100% | 258m | 100% | 14% | -3.5° |
| 15:00 | ✕ | 100% | 197m | 100% | 14% | -8.1° |
| 16:00 | ✕ | 100% | 185m | 100% | 14% | -13° |
| 17:00 | ✕ | 100% | 230m | 100% | 14% | -19° |
| 18:00 | ✕ | 100% | 1436m | 100% | 14% | -25° |
| 19:00 | ✕ | 100% | 319m | 100% | 14% | -30° |
| 20:00 | ✕ | 100% | 185m | 99% | 14% | -35° |
| 21:00 | ✕ | 100% | 202m | 99% | 14% | -39° |
| 22:00 | ✓ | 98% | 251m | 99% | 14% | -42° |
| 23:00 | ✓ | 97% | 251m | 99% | 14% | -42° |
| Mon, Mar 16 | ||||||
| 24:00 | ✓ | 100% | 281m | 99% | 7.9% | -41° |
| 01:00 | ✓ | 100% | 258m | 98% | 7.9% | -38° |
| 02:00 | ✓ | 96% | 316m | 96% | 7.9% | -33° |
| 03:00 | ✓ | 96% | 370m | 94% | 7.9% | -28° |
| 04:00 | ✓ | 100% | 369m | 95% | 7.9% | -22° |
| 05:00 | ✕ | 93% | 288m | 96% | 7.9% | -15° |
| 06:00 | ✕ | 98% | 204m | 97% | 7.9% | -9.3° |
| 07:00 | ✕ | 96% | 155m | 88% | 7.9% | -3.7° |
| 08:00 | ✕ | 96% | 173m | 80% | 7.9% | 1.2° |
| 09:00 | ✕ | 91% | 252m | 72% | 7.9% | 5.1° |
| 10:00 | ✕ | 83% | 682m | 79% | 7.9% | 7.8° |
| 11:00 | ✕ | 65% | 3042m | 87% | 7.9% | 9.2° |
| 12:00 | ✕ | 74% | 5432m | 94% | 7.9% | 9.1° |
| 13:00 | ✕ | 64% | 8916m | 95% | 7.9% | 7.5° |
| 14:00 | ✕ | 80% | 9617m | 96% | 7.9% | 4.6° |
| 15:00 | ✕ | 75% | 12705m | 98% | 7.9% | 0.61° |
| 16:00 | ✕ | 76% | 10705m | 98% | 7.9% | -4.3° |
| 17:00 | ✕ | 41% | 20116m | 98% | 7.9% | -9.7° |
| 18:00 | ✕ | 35% | 14752m | 98% | 7.9% | -15° |
| 19:00 | ✕ | 71% | 2109m | 96% | 7.9% | -21° |
| 20:00 | ✕ | 100% | 678m | 95% | 7.9% | -26° |
| 21:00 | ✕ | 100% | 539m | 93% | 7.9% | -31° |
| 22:00 | ✓ | 100% | 189m | 94% | 7.9% | -34° |
| 23:00 | ✓ | 100% | 152m | 94% | 7.9% | -36° |
| Tue, Mar 17 | ||||||
| 24:00 | ✓ | 100% | 370m | 95% | 2.9% | -36° |
| 01:00 | ✓ | 100% | 1043m | 93% | 2.9% | -35° |
| 02:00 | ✓ | 100% | 1694m | 91% | 2.9% | -31° |
| 03:00 | ✓ | 100% | 508m | 90% | 2.9% | -27° |
| 04:00 | ✓ | 100% | 319m | 92% | 2.9% | -21° |
| 05:00 | ✕ | 100% | 1000m | 94% | 2.9% | -15° |
| 06:00 | ✕ | 100% | 1866m | 96% | 2.9% | -8.8° |
| 07:00 | ✕ | 100% | 2161m | 92% | 2.9% | -2.7° |
| 08:00 | ✕ | 100% | 1401m | 89% | 2.9% | 2.9° |
| 09:00 | ✕ | 100% | 890m | 85% | 2.9% | 7.8° |
| 10:00 | ✕ | 100% | 1343m | 88% | 2.9% | 12° |
| 11:00 | ✕ | 100% | 761m | 91% | 2.9% | 14° |
| 12:00 | ✕ | 100% | 633m | 94% | 2.9% | 15° |
| 13:00 | ✕ | 100% | 196m | 88% | 2.9% | 15° |
| 14:00 | ✕ | 100% | 104m | 83% | 2.9% | 13° |
| 15:00 | ✕ | 100% | 92m | 77% | 2.9% | 9.6° |
| 16:00 | ✕ | 100% | 237m | 82% | 2.9% | 5.3° |
| 17:00 | ✕ | 100% | 70m | 86% | 2.9% | 0.17° |
| 18:00 | ✕ | 100% | 33m | 91% | 2.9% | -5.4° |
| 19:00 | ✕ | 95% | 1105m | 88% | 2.9% | -11° |
| 20:00 | ✕ | 91% | 2178m | 85% | 2.9% | -17° |
| 21:00 | ✕ | 86% | 3250m | 82% | 2.9% | -22° |
| 22:00 | ✓ | 83% | 6869m | 84% | 2.9% | -26° |
| 23:00 | ✓ | 79% | 10487m | 85% | 2.9% | -29° |
| Wed, Mar 18 | ||||||
| 24:00 | ✓ | 76% | 14106m | 87% | 0.4% | -30° |
| 01:00 | ✓ | 72% | 13944m | 79% | 0.4% | -30° |
| 02:00 | ✓ | 67% | 13782m | 70% | 0.4% | -28° |
| 03:00 | ✓ | 62% | 13620m | 62% | 0.4% | -24° |
| 04:00 | ✓ | 43% | 17125m | 60% | 0.4% | -19° |
| 05:00 | ✕ | 24% | 20630m | 59% | 0.4% | -14° |
| 06:00 | ✕ | 5% | 24135m | 57% | 0.4% | -7.7° |
| 07:00 | ✕ | 5% | 24135m | 46% | 0.4% | -1.5° |
| 08:00 | ✕ | 5% | 24135m | 34% | 0.4% | 4.6° |
| 09:00 | ✕ | 5% | 24135m | 22% | 0.4% | 10° |
| 10:00 | ✕ | 5% | 24135m | 22% | 0.4% | 15° |
| 11:00 | ✕ | 5% | 24135m | 22% | 0.4% | 19° |
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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