Rule
Dark Skies
Aspen - Dark Skies - Rocky Mountains
Aspen, 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)
Aspen
Tomorrow · 22:32–03:41 · 5h window
Medium confidence
49%
🌛Moon Altitude-36.4-4.3°
☁️Total Cloud Coverage0%
Pristine Dark Skies (pristine)
Aspen
Thu, Jun 11 · 22:33–03:41
🌛Moon Altitude:-31.8--1.6°
Medium
Pristine Dark Skies (pristine)
Aspen
Wed, Jun 17 · 22:36–03:40
🌛Moon Altitude:-29-14.6°
Low
Pristine Dark Skies (pristine)
Aspen
Fri, Jun 19 · 02:00–03:40
🌛Moon Altitude:-29.2--21.2°
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° |
|---|---|---|---|---|---|---|
| Mon, Jun 8 | ||||||
| 20:00 | ✕ | 0% | 24135m | 0% | 38% | -50° |
| 21:00 | ✕ | 0% | 24134m | 0% | 38% | -46° |
| 22:00 | ✓ | 0% | 24134m | 0% | 38% | -39° |
| 23:00 | ✓ | 0% | 24135m | 0% | 38% | -30° |
| Tue, Jun 9 | ||||||
| 24:00 | ✓ | 0% | 24135m | 0% | 38% | -20° |
| 01:00 | ✓ | 0% | 24134m | 0% | 38% | -8.5° |
| 02:00 | ✓ | 0% | 24135m | 0% | 38% | 2.9° |
| 03:00 | ✓ | 0% | 24135m | 0% | 38% | 14° |
| 04:00 | ✕ | 3.4% | 24135m | 0% | 38% | 25° |
| 05:00 | ✕ | 98% | 24134m | 0% | 38% | 36° |
| 06:00 | ✕ | 20% | 24134m | 0% | 38% | 45° |
| 07:00 | ✕ | 3.4% | 24134m | 0% | 38% | 52° |
| 08:00 | ✕ | 58% | 24134m | 0% | 38% | 54° |
| 09:00 | ✕ | 71% | 24134m | 0% | 38% | 52° |
| 10:00 | ✕ | 84% | 24134m | 0% | 38% | 46° |
| 11:00 | ✕ | 93% | 24135m | 0% | 38% | 38° |
| 12:00 | ✕ | 51% | 24134m | 0% | 38% | 28° |
| 13:00 | ✕ | 27% | 24135m | 1.7% | 38% | 17° |
| 14:00 | ✕ | 12% | 24135m | 3.3% | 38% | 5.8° |
| 15:00 | ✕ | 35% | 24135m | 5% | 38% | -5.2° |
| 16:00 | ✕ | 70% | 24135m | 12% | 38% | -16° |
| 17:00 | ✕ | 54% | 24135m | 19% | 38% | -26° |
| 18:00 | ✕ | 53% | 24135m | 26% | 29% | -34° |
| 19:00 | ✕ | 2.1% | 24135m | 37% | 29% | -41° |
| 20:00 | ✕ | 18% | 24135m | 19% | 29% | -44° |
| 21:00 | ✕ | 86% | 24135m | 0% | 29% | -43° |
| 22:00 | ✓ | 80% | 21750m | 0% | 29% | -39° |
| 23:00 | ✓ | 84% | 24135m | 0% | 29% | -32° |
| Wed, Jun 10 | ||||||
| 24:00 | ✓ | 77% | 23122m | 0% | 29% | -23° |
| 01:00 | ✓ | 17% | 24135m | 0% | 29% | -13° |
| 02:00 | ✓ | 66% | 24135m | 0% | 29% | -1.7° |
| 03:00 | ✓ | 2.4% | 24135m | 0% | 29% | 9.6° |
| 04:00 | ✕ | 0% | 24135m | 0% | 29% | 21° |
| 05:00 | ✕ | 0% | 24135m | 0% | 29% | 32° |
| 06:00 | ✕ | 0% | 24135m | 0% | 29% | 43° |
| 07:00 | ✕ | 0% | 24135m | 0% | 29% | 52° |
| 08:00 | ✕ | 0% | 24134m | 0% | 29% | 59° |
| 09:00 | ✕ | 0% | 24135m | 0% | 29% | 61° |
| 10:00 | ✕ | 0% | 24134m | 0% | 29% | 57° |
| 11:00 | ✕ | 0% | 24135m | 0% | 29% | 50° |
| 12:00 | ✕ | 0% | 24135m | 0% | 29% | 40° |
| 13:00 | ✕ | 0% | 24134m | 0% | 29% | 30° |
| 14:00 | ✕ | 0% | 24134m | 0% | 29% | 19° |
| 15:00 | ✕ | 0% | 24134m | 0% | 29% | 7.6° |
| 16:00 | ✕ | 1.7% | 24134m | 0% | 29% | -3.2° |
| 17:00 | ✕ | 0% | 24135m | 0% | 29% | -13° |
| 18:00 | ✕ | 0% | 24135m | 0% | 19% | -22° |
| 19:00 | ✕ | 0% | 24135m | 0% | 19% | -30° |
| 20:00 | ✕ | 0% | 24134m | 0% | 19% | -35° |
| 21:00 | ✕ | 0% | 24134m | 0% | 19% | -38° |
| 22:00 | ✓ | 0% | 24134m | 0% | 19% | -36° |
| 23:00 | ✓ | 0% | 24134m | 0% | 19% | -32° |
| Thu, Jun 11 | ||||||
| 24:00 | ✓ | 0% | 24134m | 0% | 19% | -25° |
| 01:00 | ✓ | 0% | 24134m | 0% | 19% | -16° |
| 02:00 | ✓ | 0% | 24134m | 0% | 19% | -6.4° |
| 03:00 | ✓ | 0% | 24134m | 0% | 19% | 4.3° |
| 04:00 | ✕ | 1.3% | 24134m | 0% | 19% | 15° |
| 05:00 | ✕ | 1.4% | 24134m | 0% | 19% | 27° |
| 06:00 | ✕ | 0% | 24134m | 0% | 19% | 38° |
| 07:00 | ✕ | 0% | 24134m | 0% | 19% | 49° |
| 08:00 | ✕ | 0% | 24135m | 0% | 19% | 59° |
| 09:00 | ✕ | 0% | 24135m | 0% | 19% | 65° |
| 10:00 | ✕ | 0% | 24134m | 0% | 19% | 67° |
| 11:00 | ✕ | 0% | 24135m | 0% | 19% | 62° |
| 12:00 | ✕ | 0% | 24135m | 0% | 19% | 53° |
| 13:00 | ✕ | 0% | 24134m | 0% | 19% | 43° |
| 14:00 | ✕ | 0% | 24134m | 0% | 19% | 32° |
| 15:00 | ✕ | 0% | 24134m | 0% | 19% | 21° |
| 16:00 | ✕ | 0% | 24135m | 0% | 19% | 9.9° |
| 17:00 | ✕ | 0% | 24134m | 0% | 19% | -0.54° |
| 18:00 | ✕ | 0% | 24134m | 0% | 10% | -10° |
| 19:00 | ✕ | 0% | 24134m | 0% | 10% | -19° |
| 20:00 | ✕ | 0% | 24134m | 0% | 10% | -26° |
| 21:00 | ✕ | 0% | 24134m | 0% | 10% | -30° |
| 22:00 | ✓ | 0% | 24135m | 0% | 10% | -32° |
| 23:00 | ✓ | 0% | 24135m | 0% | 10% | -30° |
| Fri, Jun 12 | ||||||
| 24:00 | ✓ | 0% | 24134m | 0% | 10% | -26° |
| 01:00 | ✓ | 0% | 24135m | 0% | 10% | -19° |
| 02:00 | ✓ | 0% | 24135m | 0% | 10% | -11° |
| 03:00 | ✓ | 0% | 24134m | 0% | 10% | -1.6° |
| 04:00 | ✕ | 0% | 24135m | 0% | 10% | 8.8° |
| 05:00 | ✕ | 0% | 24135m | 0% | 10% | 20° |
| 06:00 | ✕ | 0% | 24134m | 0% | 10% | 31° |
| 07:00 | ✕ | 1.2% | 24134m | 0% | 10% | 42° |
| 08:00 | ✕ | 2.3% | 24135m | 0% | 10% | 53° |
| 09:00 | ✕ | 3.5% | 24135m | 0% | 10% | 63° |
| 10:00 | ✕ | 4% | 24135m | 0% | 10% | 71° |
| 11:00 | ✕ | 4.4% | 24135m | 0% | 10% | 72° |
| 12:00 | ✕ | 4.9% | 24135m | 0% | 10% | 66° |
| 13:00 | ✕ | 37% | 24135m | 0% | 10% | 56° |
| 14:00 | ✕ | 68% | 24135m | 0% | 10% | 45° |
| 15:00 | ✕ | 100% | 24135m | 0% | 10% | 34° |
| 16:00 | ✕ | 100% | 24135m | 0% | 10% | 23° |
| 17:00 | ✕ | 100% | 24135m | 0% | 10% | 13° |
| 18:00 | ✕ | 100% | 24135m | 0% | 4.5% | 2.5° |
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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