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) at Sunrise
Steamboat Springs
Sat, Feb 21 · 07:00–08:00 · 1h window
Medium confidence
46%
🌛Moon Altitude-17.2°
☁️Total Cloud Coverage0.8%
Pristine Dark Skies (pristine)
Steamboat Springs
Sat, Feb 21 · 08:00–10:00
🌛Moon Altitude:-7.4-3.1°
Low
Pristine Dark Skies (pristine)
Steamboat Springs
Sat, Feb 21 · 20:00–21:00
🌛Moon Altitude:31.7°
Medium
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72-hour requirements breakdown
What passed or failed, hour by hour0matching hours in the next 95 hours
OR 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° |
|---|---|---|---|---|---|---|
| Mon, Feb 16 | ||||||
| 06:00 | ✓ | 100% | 24134m | 0% | 1.2% | -7.6° |
| 07:00 | ✓ | 100% | 24135m | 0% | 1.2% | 2.8° |
| 08:00 | ✓ | 100% | 24135m | 0% | 1.2% | 12° |
| 09:00 | ✓ | 100% | 24135m | 0% | 1.2% | 21° |
| 10:00 | ✓ | 100% | 24134m | 0% | 1.2% | 27° |
| 11:00 | ✓ | 100% | 24135m | 0% | 1.2% | 32° |
| 12:00 | ✓ | 100% | 24134m | 0% | 1.2% | 33° |
| 13:00 | ✓ | 100% | 24134m | 0% | 1.2% | 31° |
| 14:00 | ✓ | 100% | 24135m | 0% | 1.2% | 26° |
| 15:00 | ✓ | 100% | 24134m | 0% | 1.2% | 19° |
| 16:00 | ✓ | 100% | 24134m | 0% | 1.2% | 11° |
| 17:00 | ✓ | 100% | 24134m | 0% | 0% | 0.89° |
| 18:00 | ✓ | 100% | 24134m | 0% | 0% | -9.5° |
| 19:00 | ✓ | 98% | 24134m | 0% | 0% | -20° |
| 20:00 | ✓ | 64% | 24135m | 0% | 0% | -31° |
| 21:00 | ✓ | 0% | 24134m | 32% | 0% | -42° |
| 22:00 | ✓ | 0% | 24134m | 64% | 0% | -52° |
| 23:00 | ✓ | 0% | 24134m | 97% | 0% | -59° |
| Tue, Feb 17 | ||||||
| 24:00 | ✓ | 5% | 24134m | 99% | 0% | -63° |
| 01:00 | ✓ | 6.7% | 24134m | 99% | 0% | -61° |
| 02:00 | ✓ | 100% | 24134m | 100% | 0% | -55° |
| 03:00 | ✓ | 100% | 23925m | 100% | 0% | -45° |
| 04:00 | ✓ | 100% | 809m | 100% | 0% | -35° |
| 05:00 | ✓ | 100% | 236m | 100% | 0% | -24° |
| 06:00 | ✓ | 100% | 181m | 100% | 0% | -13° |
| 07:00 | ✓ | 100% | 718m | 100% | 0% | -1.7° |
| 08:00 | ✓ | 60% | 9342m | 100% | 0% | 8.9° |
| 09:00 | ✓ | 99% | 18179m | 100% | 0% | 19° |
| 10:00 | ✓ | 98% | 14646m | 100% | 0% | 27° |
| 11:00 | ✓ | 100% | 4274m | 100% | 0% | 34° |
| 12:00 | ✓ | 100% | 778m | 87% | 0% | 38° |
| 13:00 | ✓ | 100% | 337m | 74% | 0% | 38° |
| 14:00 | ✓ | 100% | 2709m | 61% | 0% | 36° |
| 15:00 | ✓ | 100% | 1580m | 70% | 0% | 30° |
| 16:00 | ✓ | 99% | 2258m | 79% | 0% | 22° |
| 17:00 | ✓ | 100% | 970m | 88% | 1.2% | 13° |
| 18:00 | ✓ | 100% | 3194m | 82% | 1.2% | 2.5° |
| 19:00 | ✓ | 100% | 564m | 77% | 1.2% | -8.2° |
| 20:00 | ✓ | 100% | 409m | 71% | 1.2% | -19° |
| 21:00 | ✓ | 100% | 72m | 78% | 1.2% | -30° |
| 22:00 | ✓ | 100% | 106m | 85% | 1.2% | -40° |
| 23:00 | ✓ | 100% | 56m | 93% | 1.2% | -49° |
| Wed, Feb 18 | ||||||
| 24:00 | ✓ | 100% | 69m | 95% | 1.2% | -55° |
| 01:00 | ✓ | 100% | 200m | 97% | 1.2% | -57° |
| 02:00 | ✓ | 100% | 460m | 99% | 1.2% | -55° |
| 03:00 | ✓ | 100% | 137m | 99% | 1.2% | -48° |
| 04:00 | ✓ | 100% | 724m | 99% | 1.2% | -39° |
| 05:00 | ✓ | 100% | 232m | 100% | 1.2% | -28° |
| 06:00 | ✓ | 100% | 196m | 99% | 1.2% | -17° |
| 07:00 | ✓ | 100% | 2961m | 99% | 1.2% | -6.1° |
| 08:00 | ✓ | 100% | 2808m | 99% | 1.2% | 5.1° |
| 09:00 | ✓ | 100% | 662m | 99% | 1.2% | 16° |
| 10:00 | ✓ | 100% | 507m | 100% | 1.2% | 26° |
| 11:00 | ✓ | 100% | 376m | 100% | 1.2% | 34° |
| 12:00 | ✓ | 100% | 1402m | 99% | 1.2% | 41° |
| 13:00 | ✓ | 100% | 2563m | 99% | 1.2% | 45° |
| 14:00 | ✓ | 100% | 4829m | 98% | 1.2% | 44° |
| 15:00 | ✓ | 100% | 3894m | 99% | 1.2% | 40° |
| 16:00 | ✓ | 100% | 11576m | 99% | 1.2% | 34° |
| 17:00 | ✓ | 100% | 649m | 100% | 4.5% | 25° |
| 18:00 | ✓ | 100% | 2862m | 99% | 4.5% | 15° |
| 19:00 | ✓ | 100% | 7955m | 98% | 4.5% | 4.2° |
| 20:00 | ✓ | 100% | 82m | 98% | 4.5% | -6.6° |
| 21:00 | ✓ | 99% | 81m | 98% | 4.5% | -17° |
| 22:00 | ✓ | 100% | 91m | 99% | 4.5% | -28° |
| 23:00 | ✓ | 100% | 318m | 100% | 4.5% | -37° |
| Thu, Feb 19 | ||||||
| 24:00 | ✓ | 100% | 88m | 89% | 4.5% | -45° |
| 01:00 | ✓ | 100% | 73m | 79% | 4.5% | -50° |
| 02:00 | ✓ | 100% | 107m | 69% | 4.5% | -51° |
| 03:00 | ✓ | 100% | 73m | 76% | 4.5% | -47° |
| 04:00 | ✓ | 100% | 408m | 83% | 4.5% | -40° |
| 05:00 | ✓ | 99% | 1517m | 90% | 4.5% | -31° |
| 06:00 | ✓ | 100% | 4208m | 87% | 4.5% | -21° |
| 07:00 | ✓ | 100% | 4645m | 85% | 4.5% | -10° |
| 08:00 | ✓ | 100% | 1417m | 82% | 4.5% | 0.96° |
| 09:00 | ✓ | 100% | 113m | 85% | 4.5% | 12° |
| 10:00 | ✓ | 100% | 310m | 88% | 4.5% | 23° |
| 11:00 | ✓ | 80% | 9241m | 91% | 4.5% | 33° |
| 12:00 | ✓ | 86% | 14206m | 68% | 4.5% | 42° |
| 13:00 | ✓ | 93% | 19170m | 45% | 4.5% | 49° |
| 14:00 | ✓ | 100% | 24135m | 22% | 4.5% | 52° |
| 15:00 | ✓ | 94% | 24135m | 28% | 4.5% | 50° |
| 16:00 | ✓ | 88% | 24135m | 33% | 4.5% | 45° |
| 17:00 | ✓ | 82% | 24135m | 39% | 10% | 37° |
| 18:00 | ✓ | 88% | 24135m | 39% | 10% | 27° |
| 19:00 | ✓ | 94% | 24135m | 39% | 10% | 17° |
| 20:00 | ✓ | 100% | 24135m | 39% | 10% | 6° |
| 21:00 | ✓ | 100% | 24135m | 45% | 10% | -4.8° |
| 22:00 | ✓ | 100% | 24135m | 50% | 10% | -15° |
| 23:00 | ✓ | 100% | 24135m | 56% | 10% | -25° |
| Fri, Feb 20 | ||||||
| 24:00 | ✓ | 100% | 24135m | 53% | 10% | -34° |
| 01:00 | ✓ | 100% | 24135m | 50% | 10% | -40° |
| 02:00 | ✓ | 100% | 24135m | 47% | 10% | -44° |
| 03:00 | ✓ | 100% | 24135m | 51% | 10% | -43° |
| 04:00 | ✓ | 100% | 24135m | 54% | 10% | -40° |
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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