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
Good Dark Skies
Ouray
Tomorrow · 05:00–05:06 · 1h window
Medium confidence
55%
🌛Moon Altitude9.1°
☁️Total Cloud Coverage15.6%
Pristine Dark Skies (pristine)
Ouray
Wed, Apr 15 · 02:00–04:00
🌛Moon Altitude:-37.2--27.1°
Low
Pristine Dark Skies (pristine)
Ouray
Wed, Apr 15 · 21:20–22:00
🌛Moon Altitude:-30.2°
Medium
Pristine Dark Skies (pristine)
Ouray
Sat, Apr 18 · 03:00–04:00
🌛Moon Altitude:-30.4°
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/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° |
|---|---|---|---|---|---|---|
| Fri, Apr 10 | ||||||
| 22:00 | ✓ | 100% | 24135m | 13% | 38% | -63° |
| 23:00 | ✓ | 97% | 24134m | 26% | 38% | -52° |
| Sat, Apr 11 | ||||||
| 24:00 | ✓ | 92% | 24134m | 39% | 38% | -40° |
| 01:00 | ✓ | 100% | 24134m | 39% | 38% | -29° |
| 02:00 | ✓ | 89% | 24134m | 43% | 38% | -17° |
| 03:00 | ✓ | 100% | 6537m | 39% | 38% | -6.5° |
| 04:00 | ✓ | 5.2% | 24135m | 53% | 38% | 3.8° |
| 05:00 | ✓ | 17% | 24135m | 67% | 38% | 13° |
| 06:00 | ✕ | 12% | 24134m | 82% | 38% | 21° |
| 07:00 | ✕ | 5% | 24134m | 95% | 38% | 27° |
| 08:00 | ✕ | 5% | 24135m | 98% | 38% | 30° |
| 09:00 | ✕ | 5% | 24135m | 100% | 38% | 31° |
| 10:00 | ✕ | 44% | 24135m | 100% | 38% | 28° |
| 11:00 | ✕ | 100% | 23072m | 100% | 38% | 23° |
| 12:00 | ✕ | 100% | 21750m | 100% | 38% | 15° |
| 13:00 | ✕ | 100% | 13605m | 97% | 38% | 6.2° |
| 14:00 | ✕ | 68% | 13758m | 93% | 38% | -3.9° |
| 15:00 | ✕ | 100% | 1420m | 90% | 38% | -15° |
| 16:00 | ✕ | 6.7% | 17188m | 93% | 38% | -26° |
| 17:00 | ✕ | 98% | 9067m | 96% | 38% | -37° |
| 18:00 | ✕ | 5.1% | 24134m | 99% | 29% | -48° |
| 19:00 | ✕ | 77% | 13417m | 83% | 29% | -59° |
| 20:00 | ✕ | 97% | 22089m | 68% | 29% | -67° |
| 21:00 | ✓ | 80% | 24135m | 53% | 29% | -71° |
| 22:00 | ✓ | 81% | 21814m | 52% | 29% | -66° |
| 23:00 | ✓ | 49% | 21457m | 52% | 29% | -58° |
| Sun, Apr 12 | ||||||
| 24:00 | ✓ | 24% | 24053m | 51% | 29% | -47° |
| 01:00 | ✓ | 61% | 24135m | 34% | 29% | -35° |
| 02:00 | ✓ | 61% | 24135m | 17% | 29% | -24° |
| 03:00 | ✓ | 60% | 24015m | 0% | 29% | -12° |
| 04:00 | ✓ | 19% | 11761m | 0% | 29% | -1.3° |
| 05:00 | ✓ | 16% | 21374m | 0% | 29% | 9.1° |
| 06:00 | ✕ | 5.4% | 24135m | 0% | 29% | 19° |
| 07:00 | ✕ | 2.7% | 24135m | 13% | 29% | 27° |
| 08:00 | ✕ | 44% | 24135m | 26% | 29% | 33° |
| 09:00 | ✕ | 27% | 24135m | 39% | 29% | 36° |
| 10:00 | ✕ | 0.7% | 24135m | 39% | 29% | 35° |
| 11:00 | ✕ | 5.8% | 24134m | 39% | 29% | 32° |
| 12:00 | ✕ | 13% | 24134m | 39% | 29% | 25° |
| 13:00 | ✕ | 8.4% | 24134m | 26% | 29% | 17° |
| 14:00 | ✕ | 11% | 24135m | 13% | 29% | 7.4° |
| 15:00 | ✕ | 84% | 24135m | 0% | 29% | -3.1° |
| 16:00 | ✕ | 81% | 24135m | 7.4% | 29% | -14° |
| 17:00 | ✕ | 100% | 24135m | 15% | 29% | -25° |
| 18:00 | ✕ | 100% | 24135m | 22% | 20% | -37° |
| 19:00 | ✕ | 95% | 24135m | 22% | 20% | -47° |
| 20:00 | ✕ | 100% | 24135m | 22% | 20% | -57° |
| 21:00 | ✓ | 100% | 24135m | 22% | 20% | -64° |
| 22:00 | ✓ | 99% | 24134m | 28% | 20% | -65° |
| 23:00 | ✓ | 91% | 24134m | 33% | 20% | -60° |
| Mon, Apr 13 | ||||||
| 24:00 | ✓ | 92% | 24135m | 39% | 20% | -51° |
| 01:00 | ✓ | 80% | 24135m | 33% | 20% | -41° |
| 02:00 | ✓ | 16% | 22946m | 28% | 20% | -30° |
| 03:00 | ✓ | 34% | 22645m | 22% | 20% | -18° |
| 04:00 | ✓ | 100% | 10618m | 36% | 20% | -6.5° |
| 05:00 | ✓ | 72% | 10497m | 50% | 20% | 4.8° |
| 06:00 | ✕ | 30% | 5147m | 64% | 20% | 15° |
| 07:00 | ✕ | 16% | 10838m | 61% | 20% | 25° |
| 08:00 | ✕ | 19% | 7794m | 59% | 20% | 33° |
| 09:00 | ✕ | 24% | 13696m | 56% | 20% | 39° |
| 10:00 | ✕ | 20% | 21585m | 65% | 20% | 41° |
| 11:00 | ✕ | 19% | 21743m | 74% | 20% | 40° |
| 12:00 | ✕ | 23% | 21827m | 83% | 20% | 36° |
| 13:00 | ✕ | 65% | 24050m | 83% | 20% | 28° |
| 14:00 | ✕ | 97% | 23960m | 82% | 20% | 19° |
| 15:00 | ✕ | 100% | 22144m | 82% | 20% | 8.9° |
| 16:00 | ✕ | 100% | 21607m | 87% | 20% | -2° |
| 17:00 | ✕ | 93% | 21738m | 92% | 20% | -13° |
| 18:00 | ✕ | 33% | 24134m | 97% | 12% | -25° |
| 19:00 | ✕ | 56% | 16580m | 96% | 12% | -35° |
| 20:00 | ✕ | 78% | 9026m | 95% | 12% | -46° |
| 21:00 | ✓ | 100% | 1472m | 95% | 12% | -54° |
| 22:00 | ✓ | 100% | 1013m | 96% | 12% | -59° |
| 23:00 | ✓ | 100% | 554m | 98% | 12% | -58° |
| Tue, Apr 14 | ||||||
| 24:00 | ✓ | 100% | 95m | 99% | 12% | -53° |
| 01:00 | ✓ | 78% | 7950m | 85% | 12% | -45° |
| 02:00 | ✓ | 57% | 15804m | 70% | 12% | -34° |
| 03:00 | ✓ | 35% | 23659m | 56% | 12% | -23° |
| 04:00 | ✓ | 57% | 17172m | 66% | 12% | -11° |
| 05:00 | ✓ | 78% | 10685m | 75% | 12% | 0.1° |
| 06:00 | ✕ | 100% | 4197m | 85% | 12% | 11° |
| 07:00 | ✕ | 100% | 3256m | 89% | 12% | 22° |
| 08:00 | ✕ | 100% | 2315m | 93% | 12% | 32° |
| 09:00 | ✕ | 100% | 1373m | 97% | 12% | 40° |
| 10:00 | ✕ | 100% | 992m | 97% | 12% | 46° |
| 11:00 | ✕ | 100% | 610m | 96% | 12% | 48° |
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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