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Rule Dark Skies

Crested Butte - Dark Skies - Rocky Mountains

Crested Butte, 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)
Crested Butte
Today · 10:00–16:00 · 6h window
Medium confidence
52%
🌛Moon Altitude18.8-62.7°
☁️Total Cloud Coverage5-14.7%
starry-night weather icon
Pristine Dark Skies (pristine)
Crested Butte
Tomorrow · 05:00–06:00
🌛Moon Altitude:-28.1°
Medium
starry-night weather icon
Pristine Dark Skies (pristine) at Sunrise
Crested Butte
Tomorrow · 07:00–08:00
🌛Moon Altitude:-22.6°
Medium
starry-night weather icon
Pristine Dark Skies (pristine)
Crested Butte
Tomorrow · 08:00–11:00
🌛Moon Altitude:-16.2-1.2°
Medium
starry-night weather icon
Pristine Dark Skies (pristine)
Crested Butte
Tue, Feb 24 · 02:00–03:00
🌛Moon Altitude:-5.2°
Medium
starry-night weather icon
Good Dark Skies
Crested Butte
Tue, Feb 24 · 05:00–06:00
🌛Moon Altitude:-23.2°
Medium
starry-night weather icon
Good Dark Skies at Sunrise
Crested Butte
Tue, Feb 24 · 06:00–08:00
🌛Moon Altitude:-24.6--23.3°
Low
+4 more windows in the next 10 days

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72-hour requirements breakdown

What passed or failed, hour by hour
36matching hours in the next 95 hoursJump to next match
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°
Sat, Feb 21
12:001.4%24135m0%18%37°
13:001.6%24134m0%18%47°
14:001.7%24135m0%18%57°
15:0014%24135m0%18%64°
16:001.4%24135m0%18%66°
17:005%24135m0%28%62°
18:005%24135m0%28%53°
19:004.5%24134m0%28%43°
20:005%24135m0%28%32°
21:005%24134m0%28%21°
22:005%24135m0%28%9.8°
23:005%24134m0%28%-0.76°
Sun, Feb 22
24:005%24134m0%28%-11°
01:005%24134m0%28%-19°
02:003.2%24135m0%28%-26°
03:002.2%24135m0%28%-31°
04:005%24135m0%28%-33°
05:005%24134m0%28%-32°
06:005%24135m0%28%-28°
07:004.5%24135m0%28%-21°
08:005.1%24135m0%28%-12°
09:0080%24135m0%28%-2.8°
10:0012%24135m0%28%7.8°
11:0015%24135m0%28%19°
12:006.4%24134m0%28%30°
13:005%24134m0%28%41°
14:005%24135m0%28%53°
15:005.1%24135m0%28%63°
16:0030%24135m0%28%70°
17:0084%24135m0%38%71°
18:0099%24135m0%38%65°
19:00100%24135m0%38%56°
20:0092%24135m0%38%45°
21:00100%24134m0%38%34°
22:00100%24135m0%38%23°
23:00100%24134m0%38%12°
Mon, Feb 23
24:0099%24135m0%38%1.7°
01:0082%24134m0%38%-7.7°
02:0067%24135m0%38%-16°
03:0074%24134m0%38%-22°
04:0097%24134m0%38%-27°
05:005%24135m0%38%-28°
06:0032%24134m0%38%-27°
07:005%24135m0%38%-23°
08:005%24135m0%38%-16°
09:0018%24134m0%38%-8.1°
10:005%24134m0%38%1.2°
11:0016%24134m0%38%11°
12:0099%24135m0%38%22°
13:005%24135m0%38%33°
14:005%24135m0%38%45°
15:005%24135m0%38%56°
16:007.1%24134m0%38%66°
17:005.3%24135m0%50%74°
18:0026%24134m0%50%75°
19:00100%24135m0%50%68°
20:0073%24135m0%50%58°
21:005.1%24135m0%50%47°
22:006.8%24135m0%50%35°
23:007.5%24135m0%50%24°
Tue, Feb 24
24:0098%24134m0%50%14°
01:0079%24134m0%50%3.9°
02:005%24135m0%50%-5.2°
03:0029%24135m0%50%-13°
04:0033%24134m0%50%-19°
05:0020%24135m0%50%-23°
06:0019%24134m0%50%-25°
07:0014%24135m0%50%-23°
08:0057%24135m0%50%-19°
09:00100%24134m0%50%-13°
10:0012%24135m0%50%-5.6°
11:006.9%24135m0%50%3.5°
12:007%24134m0%50%13°
13:005%24134m0%50%24°
14:005%24134m0%50%35°
15:005%24134m7.4%50%46°
16:005%24134m15%50%57°
17:007%24135m22%61%68°
18:0037%16222m28%61%77°
19:0066%8309m33%61%78°
20:0096%396m39%61%70°
21:0097%311m43%61%59°
22:0099%227m48%61%48°
23:00100%142m52%61%37°
Wed, Feb 25
24:00100%134m58%61%26°
01:00100%126m63%61%15°
02:00100%118m69%61%5.6°
03:00100%123m74%61%-3.4°
04:00100%128m80%61%-11°
05:00100%134m85%61%-17°
06:00100%136m89%61%-21°
07:00100%138m93%61%-23°
08:00100%140m97%61%-22°
09:00100%184m98%61%-18°
10:00100%229m99%61%-12°
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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