Rule
Dark Skies
Breckenridge - Dark Skies - Rocky Mountains
Silverthorne, 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
Breckenridge
Tomorrow · 03:00–03:47 · 1h window
Medium confidence
56%
🌛Moon Altitude-4.5°
☁️Total Cloud Coverage16.7%
Pristine Dark Skies (pristine)
Breckenridge
Thu, May 28 · 03:00–03:44
🌛Moon Altitude:7.5°
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° |
|---|---|---|---|---|---|---|
| Sat, May 23 | ||||||
| 23:00 | ✓ | 5% | 24135m | 1.2% | 61% | 36° |
| Sun, May 24 | ||||||
| 24:00 | ✕ | 58% | 24134m | 0% | 61% | 25° |
| 01:00 | ✓ | 54% | 24134m | 0% | 61% | 14° |
| 02:00 | ✓ | 5% | 24134m | 0% | 61% | 2.7° |
| 03:00 | ✓ | 3.6% | 24134m | 0% | 61% | -8.5° |
| 04:00 | ✕ | 7.8% | 24135m | 0% | 61% | -19° |
| 05:00 | ✕ | 15% | 24134m | 0% | 61% | -29° |
| 06:00 | ✕ | 5.2% | 24135m | 0% | 61% | -38° |
| 07:00 | ✕ | 5% | 24135m | 13% | 61% | -44° |
| 08:00 | ✕ | 20% | 24135m | 26% | 61% | -46° |
| 09:00 | ✕ | 91% | 24134m | 39% | 61% | -45° |
| 10:00 | ✕ | 100% | 24134m | 39% | 61% | -40° |
| 11:00 | ✕ | 100% | 24134m | 39% | 61% | -32° |
| 12:00 | ✕ | 100% | 24134m | 39% | 61% | -23° |
| 13:00 | ✕ | 100% | 24135m | 45% | 61% | -12° |
| 14:00 | ✕ | 98% | 24134m | 51% | 61% | -1.4° |
| 15:00 | ✕ | 100% | 24135m | 58% | 61% | 9.6° |
| 16:00 | ✕ | 100% | 24134m | 60% | 61% | 20° |
| 17:00 | ✕ | 100% | 24135m | 62% | 61% | 31° |
| 18:00 | ✕ | 6.9% | 24135m | 64% | 71% | 40° |
| 19:00 | ✕ | 20% | 24135m | 43% | 71% | 47° |
| 20:00 | ✕ | 74% | 24135m | 21% | 71% | 51° |
| 21:00 | ✕ | 97% | 24135m | 0% | 71% | 51° |
| 22:00 | ✓ | 60% | 24134m | 0% | 71% | 46° |
| 23:00 | ✓ | 48% | 24134m | 0% | 71% | 38° |
| Mon, May 25 | ||||||
| 24:00 | ✓ | 5% | 24134m | 0% | 71% | 29° |
| 01:00 | ✓ | 44% | 24135m | 0% | 71% | 18° |
| 02:00 | ✓ | 30% | 24134m | 0% | 71% | 6.9° |
| 03:00 | ✓ | 17% | 24135m | 0% | 71% | -4.5° |
| 04:00 | ✕ | 5% | 24135m | 0% | 71% | -16° |
| 05:00 | ✕ | 5% | 24134m | 0% | 71% | -27° |
| 06:00 | ✕ | 5% | 24135m | 0% | 71% | -37° |
| 07:00 | ✕ | 5% | 24134m | 16% | 71% | -45° |
| 08:00 | ✕ | 85% | 24134m | 32% | 71% | -51° |
| 09:00 | ✕ | 26% | 24134m | 48% | 71% | -52° |
| 10:00 | ✕ | 100% | 24134m | 60% | 71% | -49° |
| 11:00 | ✕ | 100% | 24135m | 72% | 71% | -43° |
| 12:00 | ✕ | 100% | 24134m | 84% | 71% | -34° |
| 13:00 | ✕ | 98% | 24135m | 86% | 71% | -24° |
| 14:00 | ✕ | 100% | 24134m | 88% | 71% | -13° |
| 15:00 | ✕ | 100% | 22187m | 90% | 71% | -2.1° |
| 16:00 | ✕ | 100% | 24134m | 92% | 71% | 8.9° |
| 17:00 | ✕ | 100% | 24134m | 93% | 71% | 19° |
| 18:00 | ✕ | 100% | 7105m | 94% | 80% | 29° |
| 19:00 | ✕ | 100% | 160m | 63% | 80% | 37° |
| 20:00 | ✕ | 100% | 5728m | 31% | 80% | 43° |
| 21:00 | ✕ | 100% | 24134m | 0% | 80% | 45° |
| 22:00 | ✓ | 94% | 24134m | 0% | 80% | 44° |
| 23:00 | ✓ | 100% | 24134m | 0% | 80% | 39° |
| Tue, May 26 | ||||||
| 24:00 | ✓ | 99% | 24135m | 0% | 80% | 31° |
| 01:00 | ✓ | 100% | 24134m | 17% | 80% | 21° |
| 02:00 | ✓ | 99% | 24135m | 33% | 80% | 11° |
| 03:00 | ✓ | 100% | 24134m | 50% | 80% | -0.44° |
| 04:00 | ✕ | 100% | 24135m | 49% | 80% | -12° |
| 05:00 | ✕ | 100% | 24134m | 47% | 80% | -23° |
| 06:00 | ✕ | 100% | 24134m | 46% | 80% | -34° |
| 07:00 | ✕ | 100% | 24134m | 62% | 80% | -44° |
| 08:00 | ✕ | 100% | 24135m | 78% | 80% | -52° |
| 09:00 | ✕ | 100% | 24135m | 93% | 80% | -58° |
| 10:00 | ✕ | 100% | 24134m | 95% | 80% | -58° |
| 11:00 | ✕ | 100% | 18771m | 98% | 80% | -53° |
| 12:00 | ✕ | 100% | 14968m | 100% | 80% | -45° |
| 13:00 | ✕ | 100% | 15639m | 99% | 80% | -35° |
| 14:00 | ✕ | 100% | 16309m | 97% | 80% | -25° |
| 15:00 | ✕ | 100% | 16980m | 96% | 80% | -13° |
| 16:00 | ✕ | 100% | 16127m | 97% | 80% | -2.5° |
| 17:00 | ✕ | 100% | 15273m | 98% | 80% | 8.2° |
| 18:00 | ✕ | 100% | 14420m | 99% | 87% | 18° |
| 19:00 | ✕ | 99% | 17658m | 79% | 87% | 27° |
| 20:00 | ✕ | 97% | 20897m | 60% | 87% | 34° |
| 21:00 | ✕ | 96% | 24135m | 40% | 87% | 38° |
| 22:00 | ✓ | 97% | 24135m | 32% | 87% | 39° |
| 23:00 | ✓ | 99% | 24135m | 25% | 87% | 37° |
| Wed, May 27 | ||||||
| 24:00 | ✓ | 100% | 24135m | 17% | 87% | 31° |
| 01:00 | ✓ | 100% | 23942m | 16% | 87% | 23° |
| 02:00 | ✓ | 100% | 23750m | 14% | 87% | 14° |
| 03:00 | ✓ | 100% | 23557m | 13% | 87% | 3.6° |
| 04:00 | ✕ | 99% | 23750m | 14% | 87% | -7.4° |
| 05:00 | ✕ | 97% | 23942m | 16% | 87% | -19° |
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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