Rule
Dark Skies
Ouray - Dark Skies - Rocky Mountains
Ouray, Colorado, 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/Denver
Next opportunity
Pristine Dark Skies (pristine)
Ouray
Wed, May 27 · 03:00–04:01 · 1h window
Low confidence
33%
🌛Moon Altitude-5.9-5.3°
☁️Total Cloud Coverage5%
Pristine Dark Skies (pristine)
Ouray
Thu, May 28 · 03:00–04:00
🌛Moon Altitude:-1.1-9.4°
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/Denver | 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, May 23 | ||||||
| 23:00 | ✓ | 29% | 24135m | 0% | 61% | 38° |
| Sun, May 24 | ||||||
| 24:00 | ✕ | 4.5% | 24134m | 0% | 61% | 27° |
| 01:00 | ✓ | 4.3% | 24134m | 0% | 61% | 15° |
| 02:00 | ✓ | 0% | 24134m | 0% | 61% | 3.8° |
| 03:00 | ✓ | 0% | 24134m | 0% | 61% | -7.7° |
| 04:00 | ✓ | 1.9% | 24135m | 0% | 61% | -19° |
| 05:00 | ✕ | 4.9% | 24134m | 0% | 61% | -29° |
| 06:00 | ✕ | 4.9% | 24135m | 0% | 61% | -38° |
| 07:00 | ✕ | 4.8% | 24135m | 19% | 61% | -45° |
| 08:00 | ✕ | 85% | 24135m | 37% | 61% | -48° |
| 09:00 | ✕ | 34% | 24134m | 56% | 61% | -47° |
| 10:00 | ✕ | 99% | 24134m | 50% | 61% | -42° |
| 11:00 | ✕ | 100% | 24134m | 44% | 61% | -34° |
| 12:00 | ✕ | 100% | 21623m | 38% | 61% | -25° |
| 13:00 | ✕ | 84% | 24135m | 27% | 61% | -14° |
| 14:00 | ✕ | 100% | 14983m | 16% | 61% | -2.8° |
| 15:00 | ✕ | 100% | 22943m | 5% | 61% | 8.5° |
| 16:00 | ✕ | 97% | 24134m | 3.3% | 61% | 20° |
| 17:00 | ✕ | 52% | 24135m | 1.7% | 61% | 30° |
| 18:00 | ✕ | 56% | 24135m | 0% | 71% | 40° |
| 19:00 | ✕ | 96% | 24135m | 1.7% | 71% | 48° |
| 20:00 | ✕ | 25% | 24135m | 3.3% | 71% | 52° |
| 21:00 | ✕ | 50% | 24135m | 5% | 71% | 52° |
| 22:00 | ✓ | 4.5% | 24134m | 3.3% | 71% | 48° |
| 23:00 | ✓ | 6.2% | 24134m | 1.7% | 71% | 40° |
| Mon, May 25 | ||||||
| 24:00 | ✓ | 85% | 24134m | 0% | 71% | 31° |
| 01:00 | ✓ | 65% | 24135m | 0% | 71% | 20° |
| 02:00 | ✓ | 99% | 24134m | 0% | 71% | 8.3° |
| 03:00 | ✓ | 99% | 24135m | 0% | 71% | -3.3° |
| 04:00 | ✓ | 95% | 24135m | 8.7% | 71% | -15° |
| 05:00 | ✕ | 100% | 24134m | 17% | 71% | -26° |
| 06:00 | ✕ | 96% | 24135m | 26% | 71% | -37° |
| 07:00 | ✕ | 88% | 24134m | 34% | 71% | -45° |
| 08:00 | ✕ | 84% | 24134m | 43% | 71% | -52° |
| 09:00 | ✕ | 100% | 24134m | 51% | 71% | -54° |
| 10:00 | ✕ | 100% | 24134m | 63% | 71% | -51° |
| 11:00 | ✕ | 100% | 24135m | 75% | 71% | -45° |
| 12:00 | ✕ | 100% | 24134m | 87% | 71% | -36° |
| 13:00 | ✕ | 100% | 24135m | 86% | 71% | -26° |
| 14:00 | ✕ | 100% | 21926m | 85% | 71% | -15° |
| 15:00 | ✕ | 100% | 24135m | 84% | 71% | -3.2° |
| 16:00 | ✕ | 28% | 24134m | 85% | 71% | 8° |
| 17:00 | ✕ | 100% | 24134m | 87% | 71% | 19° |
| 18:00 | ✕ | 100% | 24135m | 88% | 80% | 29° |
| 19:00 | ✕ | 100% | 14153m | 67% | 80% | 38° |
| 20:00 | ✕ | 100% | 23920m | 46% | 80% | 44° |
| 21:00 | ✕ | 100% | 21820m | 26% | 80% | 47° |
| 22:00 | ✓ | 100% | 24134m | 30% | 80% | 46° |
| 23:00 | ✓ | 100% | 24134m | 34% | 80% | 41° |
| Tue, May 26 | ||||||
| 24:00 | ✓ | 47% | 24135m | 38% | 80% | 33° |
| 01:00 | ✓ | 100% | 24134m | 49% | 80% | 23° |
| 02:00 | ✓ | 100% | 24135m | 60% | 80% | 12° |
| 03:00 | ✓ | 87% | 23188m | 72% | 80% | 1° |
| 04:00 | ✓ | 99% | 24135m | 80% | 80% | -11° |
| 05:00 | ✕ | 100% | 23738m | 88% | 80% | -22° |
| 06:00 | ✕ | 100% | 21228m | 96% | 80% | -33° |
| 07:00 | ✕ | 100% | 21161m | 97% | 80% | -44° |
| 08:00 | ✕ | 98% | 18337m | 98% | 80% | -53° |
| 09:00 | ✕ | 5.7% | 19109m | 98% | 80% | -59° |
| 10:00 | ✕ | 16% | 20047m | 99% | 80% | -60° |
| 11:00 | ✕ | 74% | 24135m | 99% | 80% | -55° |
| 12:00 | ✕ | 92% | 24134m | 99% | 80% | -47° |
| 13:00 | ✕ | 69% | 24134m | 94% | 80% | -37° |
| 14:00 | ✕ | 47% | 24135m | 88% | 80% | -26° |
| 15:00 | ✕ | 24% | 24135m | 82% | 80% | -15° |
| 16:00 | ✕ | 23% | 24135m | 86% | 80% | -3.4° |
| 17:00 | ✕ | 21% | 24135m | 89% | 80% | 7.6° |
| 18:00 | ✕ | 20% | 24135m | 93% | 87% | 18° |
| 19:00 | ✕ | 28% | 24135m | 63% | 87% | 27° |
| 20:00 | ✕ | 37% | 24135m | 34% | 87% | 35° |
| 21:00 | ✕ | 45% | 24135m | 4.9% | 87% | 40° |
| 22:00 | ✓ | 35% | 24135m | 3.3% | 87% | 41° |
| 23:00 | ✓ | 25% | 24135m | 1.6% | 87% | 39° |
| Wed, May 27 | ||||||
| 24:00 | ✓ | 15% | 24135m | 0% | 87% | 33° |
| 01:00 | ✓ | 12% | 24135m | 0% | 87% | 25° |
| 02:00 | ✓ | 8.3% | 24135m | 0% | 87% | 16° |
| 03:00 | ✓ | 5% | 24135m | 0% | 87% | 5.3° |
| 04:00 | ✓ | 5% | 24135m | 7.4% | 87% | -5.9° |
| 05:00 | ✕ | 5% | 24135m | 15% | 87% | -17° |
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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