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
Sat, Apr 11 · 21:19–23:00 · 2h window
Low confidence
37%
🌛Moon Altitude-68.1--64.1°
☁️Total Cloud Coverage5-14.9%
Pristine Dark Skies (pristine)
Steamboat Springs
Sun, Apr 12 · 02:00–04:56
🌛Moon Altitude:-23.4--1.6°
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° |
|---|---|---|---|---|---|---|
| Wed, Apr 8 | ||||||
| 01:00 | ✓ | 8.7% | 24135m | 0% | 66% | -6° |
| 02:00 | ✓ | 7.4% | 24134m | 0% | 66% | 2.7° |
| 03:00 | ✓ | 3.4% | 24135m | 0% | 66% | 10° |
| 04:00 | ✓ | 7.8% | 24134m | 0% | 66% | 16° |
| 05:00 | ✓ | 41% | 24135m | 0% | 66% | 20° |
| 06:00 | ✕ | 30% | 24134m | 0% | 66% | 21° |
| 07:00 | ✕ | 7.7% | 24134m | 0% | 66% | 20° |
| 08:00 | ✕ | 5% | 24134m | 0% | 66% | 16° |
| 09:00 | ✕ | 3% | 24135m | 0% | 66% | 10° |
| 10:00 | ✕ | 4.3% | 24135m | 0% | 66% | 2.9° |
| 11:00 | ✕ | 4.7% | 24134m | 0% | 66% | -5.9° |
| 12:00 | ✕ | 3.2% | 24135m | 0% | 66% | -16° |
| 13:00 | ✕ | 3.2% | 24135m | 0% | 66% | -26° |
| 14:00 | ✕ | 6.9% | 24134m | 0% | 66% | -37° |
| 15:00 | ✕ | 13% | 24134m | 0% | 66% | -48° |
| 16:00 | ✕ | 11% | 24135m | 13% | 66% | -59° |
| 17:00 | ✕ | 12% | 24135m | 26% | 66% | -69° |
| 18:00 | ✕ | 86% | 24135m | 39% | 57% | -76° |
| 19:00 | ✕ | 100% | 24134m | 44% | 57% | -76° |
| 20:00 | ✕ | 91% | 23144m | 39% | 57% | -67° |
| 21:00 | ✓ | 99% | 24135m | 34% | 57% | -57° |
| 22:00 | ✓ | 100% | 14717m | 30% | 57% | -46° |
| 23:00 | ✓ | 67% | 24135m | 26% | 57% | -35° |
| Thu, Apr 9 | ||||||
| 24:00 | ✓ | 27% | 24134m | 22% | 57% | -24° |
| 01:00 | ✓ | 5.5% | 24135m | 15% | 57% | -14° |
| 02:00 | ✓ | 48% | 24135m | 7.4% | 57% | -4.2° |
| 03:00 | ✓ | 50% | 24134m | 0% | 57% | 4.6° |
| 04:00 | ✓ | 5% | 24135m | 0% | 57% | 12° |
| 05:00 | ✓ | 71% | 24134m | 0% | 57% | 18° |
| 06:00 | ✕ | 47% | 24134m | 0% | 57% | 21° |
| 07:00 | ✕ | 56% | 24135m | 0% | 57% | 22° |
| 08:00 | ✕ | 38% | 24135m | 0% | 57% | 21° |
| 09:00 | ✕ | 8.5% | 24135m | 0% | 57% | 17° |
| 10:00 | ✕ | 40% | 24134m | 7.4% | 57% | 10° |
| 11:00 | ✕ | 99% | 24135m | 15% | 57% | 2.7° |
| 12:00 | ✕ | 47% | 24135m | 22% | 57% | -6.3° |
| 13:00 | ✕ | 51% | 24135m | 28% | 57% | -16° |
| 14:00 | ✕ | 85% | 24135m | 33% | 57% | -27° |
| 15:00 | ✕ | 35% | 24134m | 39% | 57% | -37° |
| 16:00 | ✕ | 90% | 24134m | 45% | 57% | -48° |
| 17:00 | ✕ | 100% | 24135m | 50% | 57% | -59° |
| 18:00 | ✕ | 100% | 24134m | 56% | 47% | -69° |
| 19:00 | ✕ | 100% | 24135m | 39% | 47% | -75° |
| 20:00 | ✕ | 100% | 24135m | 21% | 47% | -73° |
| 21:00 | ✓ | 66% | 22441m | 3.5% | 47% | -65° |
| 22:00 | ✓ | 100% | 24134m | 2.3% | 47% | -54° |
| 23:00 | ✓ | 100% | 23939m | 1.2% | 47% | -43° |
| Fri, Apr 10 | ||||||
| 24:00 | ✓ | 99% | 24135m | 0% | 47% | -32° |
| 01:00 | ✓ | 100% | 24134m | 0% | 47% | -21° |
| 02:00 | ✓ | 96% | 24134m | 0% | 47% | -11° |
| 03:00 | ✓ | 87% | 24135m | 0% | 47% | -1.1° |
| 04:00 | ✓ | 93% | 24135m | 0% | 47% | 7.7° |
| 05:00 | ✓ | 85% | 24135m | 0% | 47% | 15° |
| 06:00 | ✕ | 100% | 24135m | 0% | 47% | 21° |
| 07:00 | ✕ | 81% | 24135m | 0% | 47% | 24° |
| 08:00 | ✕ | 98% | 24134m | 0% | 47% | 25° |
| 09:00 | ✕ | 100% | 24135m | 0% | 47% | 23° |
| 10:00 | ✕ | 100% | 24134m | 0% | 47% | 18° |
| 11:00 | ✕ | 100% | 24135m | 0% | 47% | 11° |
| 12:00 | ✕ | 100% | 24134m | 0% | 47% | 3.2° |
| 13:00 | ✕ | 100% | 19640m | 0% | 47% | -6.1° |
| 14:00 | ✕ | 100% | 24135m | 0% | 47% | -16° |
| 15:00 | ✕ | 100% | 24134m | 0% | 47% | -27° |
| 16:00 | ✕ | 100% | 24135m | 0% | 47% | -38° |
| 17:00 | ✕ | 100% | 24135m | 0% | 47% | -49° |
| 18:00 | ✕ | 100% | 24134m | 0% | 38% | -59° |
| 19:00 | ✕ | 100% | 24135m | 0% | 38% | -68° |
| 20:00 | ✕ | 100% | 24134m | 0% | 38% | -72° |
| 21:00 | ✓ | 100% | 24135m | 0% | 38% | -69° |
| 22:00 | ✓ | 100% | 24134m | 7.4% | 38% | -61° |
| 23:00 | ✓ | 82% | 24135m | 15% | 38% | -50° |
| Sat, Apr 11 | ||||||
| 24:00 | ✓ | 100% | 24135m | 22% | 38% | -39° |
| 01:00 | ✓ | 96% | 24134m | 23% | 38% | -28° |
| 02:00 | ✓ | 99% | 24134m | 24% | 38% | -17° |
| 03:00 | ✓ | 83% | 24134m | 25% | 38% | -6.8° |
| 04:00 | ✓ | 100% | 24135m | 29% | 38% | 3.1° |
| 05:00 | ✕ | 100% | 24135m | 33% | 38% | 12° |
| 06:00 | ✕ | 100% | 24134m | 38% | 38% | 19° |
| 07:00 | ✕ | 100% | 18772m | 41% | 38% | 25° |
| 08:00 | ✕ | 100% | 13411m | 45% | 38% | 28° |
| 09:00 | ✕ | 100% | 8049m | 49% | 38% | 28° |
| 10:00 | ✕ | 100% | 13411m | 63% | 38% | 26° |
| 11:00 | ✕ | 100% | 18773m | 76% | 38% | 20° |
| 12:00 | ✕ | 100% | 24135m | 90% | 38% | 13° |
| 13:00 | ✕ | 99% | 24135m | 79% | 38% | 4.3° |
| 14:00 | ✕ | 98% | 24135m | 69% | 38% | -5.4° |
| 15:00 | ✕ | 98% | 24135m | 58% | 38% | -16° |
| 16:00 | ✕ | 66% | 24135m | 59% | 38% | -27° |
| 17:00 | ✕ | 35% | 24135m | 60% | 38% | -38° |
| 18:00 | ✕ | 3.9% | 24135m | 61% | 29% | -48° |
| 19:00 | ✕ | 4.3% | 24135m | 41% | 29% | -58° |
| 20:00 | ✕ | 4.6% | 24135m | 20% | 29% | -66° |
| 21:00 | ✓ | 5% | 24135m | 0% | 29% | -68° |
| 22:00 | ✓ | 15% | 24135m | 0% | 29% | -64° |
| 23:00 | ✓ | 25% | 24135m | 0% | 29% | -56° |
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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