Rule
Dark Skies
Steamboat Springs - Dark Skies - Rocky Mountains
Steamboat Springs, 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)
Steamboat Springs
Tomorrow · 02:00–03:00 · 1h window
Medium confidence
60%
🌛Moon Altitude7.3°
☁️Total Cloud Coverage5%
Pristine Dark Skies (pristine)
Steamboat Springs
Thu, May 28 · 03:00–03:42
🌛Moon Altitude:7.6°
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 | ✓ | 27% | 24135m | 0% | 61% | 36° |
| Sun, May 24 | ||||||
| 24:00 | ✕ | 19% | 24134m | 0% | 61% | 26° |
| 01:00 | ✓ | 4.5% | 24134m | 0% | 61% | 15° |
| 02:00 | ✓ | 0% | 24134m | 0% | 61% | 3.4° |
| 03:00 | ✓ | 0% | 24134m | 0% | 61% | -7.7° |
| 04:00 | ✕ | 3.1% | 24135m | 0% | 61% | -18° |
| 05:00 | ✕ | 1.7% | 24134m | 0% | 61% | -28° |
| 06:00 | ✕ | 40% | 24135m | 0% | 61% | -36° |
| 07:00 | ✕ | 9.3% | 24135m | 0% | 61% | -43° |
| 08:00 | ✕ | 100% | 24135m | 0% | 61% | -45° |
| 09:00 | ✕ | 100% | 24134m | 0% | 61% | -44° |
| 10:00 | ✕ | 76% | 24134m | 0% | 61% | -39° |
| 11:00 | ✕ | 79% | 24134m | 0% | 61% | -32° |
| 12:00 | ✕ | 82% | 24134m | 0% | 61% | -23° |
| 13:00 | ✕ | 100% | 24135m | 4.9% | 61% | -13° |
| 14:00 | ✕ | 83% | 24134m | 9.8% | 61% | -1.9° |
| 15:00 | ✕ | 86% | 24135m | 15% | 61% | 9° |
| 16:00 | ✕ | 94% | 24134m | 17% | 61% | 20° |
| 17:00 | ✕ | 89% | 24135m | 20% | 61% | 30° |
| 18:00 | ✕ | 34% | 24135m | 22% | 71% | 39° |
| 19:00 | ✕ | 44% | 24135m | 15% | 71% | 46° |
| 20:00 | ✕ | 49% | 24135m | 8% | 71% | 50° |
| 21:00 | ✕ | 5% | 24135m | 0.91% | 71% | 50° |
| 22:00 | ✓ | 17% | 24134m | 0.61% | 71% | 46° |
| 23:00 | ✓ | 75% | 24134m | 0.3% | 71% | 38° |
| Mon, May 25 | ||||||
| 24:00 | ✓ | 6.4% | 24134m | 0% | 71% | 29° |
| 01:00 | ✓ | 7.3% | 24135m | 0% | 71% | 18° |
| 02:00 | ✓ | 5% | 24134m | 0% | 71% | 7.3° |
| 03:00 | ✓ | 34% | 24135m | 0% | 71% | -3.9° |
| 04:00 | ✕ | 6% | 24135m | 0% | 71% | -15° |
| 05:00 | ✕ | 37% | 24134m | 0% | 71% | -26° |
| 06:00 | ✕ | 5% | 24135m | 0% | 71% | -36° |
| 07:00 | ✕ | 5% | 24134m | 0% | 71% | -44° |
| 08:00 | ✕ | 5% | 24134m | 0% | 71% | -50° |
| 09:00 | ✕ | 12% | 24134m | 0% | 71% | -52° |
| 10:00 | ✕ | 87% | 24134m | 5.6% | 71% | -49° |
| 11:00 | ✕ | 57% | 24135m | 11% | 71% | -43° |
| 12:00 | ✕ | 85% | 24134m | 17% | 71% | -34° |
| 13:00 | ✕ | 99% | 24135m | 34% | 71% | -24° |
| 14:00 | ✕ | 100% | 24134m | 52% | 71% | -14° |
| 15:00 | ✕ | 99% | 23883m | 69% | 71% | -2.7° |
| 16:00 | ✕ | 4% | 24134m | 72% | 71% | 8.1° |
| 17:00 | ✕ | 99% | 24134m | 75% | 71% | 19° |
| 18:00 | ✕ | 100% | 21204m | 79% | 80% | 28° |
| 19:00 | ✕ | 100% | 8434m | 52% | 80% | 36° |
| 20:00 | ✕ | 100% | 13093m | 26% | 80% | 42° |
| 21:00 | ✕ | 100% | 24134m | 0% | 80% | 44° |
| 22:00 | ✓ | 96% | 24134m | 0% | 80% | 43° |
| 23:00 | ✓ | 97% | 24134m | 0% | 80% | 38° |
| Tue, May 26 | ||||||
| 24:00 | ✓ | 100% | 24135m | 0% | 80% | 31° |
| 01:00 | ✓ | 100% | 24134m | 13% | 80% | 21° |
| 02:00 | ✓ | 100% | 24135m | 26% | 80% | 11° |
| 03:00 | ✓ | 68% | 24134m | 39% | 80% | 0.01° |
| 04:00 | ✕ | 100% | 24135m | 52% | 80% | -11° |
| 05:00 | ✕ | 97% | 24134m | 65% | 80% | -22° |
| 06:00 | ✕ | 88% | 24134m | 78% | 80% | -33° |
| 07:00 | ✕ | 100% | 24134m | 84% | 80% | -43° |
| 08:00 | ✕ | 96% | 24135m | 90% | 80% | -51° |
| 09:00 | ✕ | 100% | 24135m | 96% | 80% | -57° |
| 10:00 | ✕ | 100% | 24134m | 97% | 80% | -57° |
| 11:00 | ✕ | 100% | 23731m | 97% | 80% | -53° |
| 12:00 | ✕ | 100% | 8361m | 97% | 80% | -45° |
| 13:00 | ✕ | 100% | 11333m | 93% | 80% | -35° |
| 14:00 | ✕ | 99% | 14304m | 88% | 80% | -25° |
| 15:00 | ✕ | 99% | 17276m | 84% | 80% | -14° |
| 16:00 | ✕ | 99% | 19562m | 84% | 80% | -3.2° |
| 17:00 | ✕ | 98% | 21849m | 84% | 80% | 7.4° |
| 18:00 | ✕ | 98% | 24135m | 84% | 87% | 17° |
| 19:00 | ✕ | 69% | 24135m | 61% | 87% | 26° |
| 20:00 | ✕ | 41% | 24135m | 37% | 87% | 33° |
| 21:00 | ✕ | 13% | 24135m | 13% | 87% | 37° |
| 22:00 | ✓ | 42% | 24135m | 8.8% | 87% | 39° |
| 23:00 | ✓ | 71% | 24135m | 4.4% | 87% | 36° |
| Wed, May 27 | ||||||
| 24:00 | ✓ | 100% | 24135m | 0% | 87% | 31° |
| 01:00 | ✓ | 98% | 24135m | 3.1% | 87% | 23° |
| 02:00 | ✓ | 95% | 24135m | 6.2% | 87% | 14° |
| 03:00 | ✓ | 93% | 24135m | 9.3% | 87% | 3.9° |
| 04:00 | ✕ | 80% | 24135m | 23% | 87% | -7° |
| 05:00 | ✕ | 68% | 24135m | 36% | 87% | -18° |
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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