What conditions does Dark Skies look for?

Astronomical Night: Any. Total Cloud Coverage: ≤ 20.0%. Visibility: ≥ 12000.0m. Precipitation Chance: ≤ 10.0%. Moon Illumination: ≤ 35.0%. Moon Altitude: ≤ 10.0°

How often do conditions match?

There are 7 upcoming opportunity windows in the next 10 days.

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Rule Dark Skies

Telluride - Dark Skies - Rocky Mountains

Telluride, 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)

Telluride

Tomorrow · 22:31–03:52 · 5h window

Medium confidence

57%

🌛Moon Altitude-25.1--1.3°

☁️Total Cloud Coverage0-4.2%

Pristine Dark Skies (pristine)

Telluride

Tue, Jun 16 · 22:31–03:52

🌛Moon Altitude:-28.3-7.2°

Medium

Pristine Dark Skies (pristine)

Telluride

Wed, Jun 17 · 22:31–03:52

🌛Moon Altitude:-29.8-15°

Low

Pristine Dark Skies (pristine)

Telluride

Thu, Jun 18 · 22:32–03:52

🌛Moon Altitude:-29.7-21.9°

Low

Pristine Dark Skies (pristine)

Telluride

Sun, Jun 21 · 24:00–03:53

🌛Moon Altitude:-25.2-9.1°

Low

Pristine Dark Skies (pristine)

Telluride

Tue, Jun 23 · 01:00–03:53

🌛Moon Altitude:-16.6-6.2°

Low

Pristine Dark Skies (pristine)

Telluride

Wed, Jun 24 · 02:00–03:54

🌛Moon Altitude:-11.5--0.3°

Low

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72-hour requirements breakdown

What passed or failed, hour by hour

12matching 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, Jun 13
20:00	✕	100%	7104m	7.4%	0.7%	-3.9°
21:00	✕	100%	24134m	0%	0.7%	-12°
22:00	✓	100%	24134m	13%	0.7%	-19°
23:00	✕	100%	24134m	26%	0.7%	-23°
Sun, Jun 14
24:00	✓	100%	24135m	39%	0.7%	-25°
01:00	✓	100%	24134m	0%	0.7%	-24°
02:00	✓	30%	24134m	0%	0.7%	-21°
03:00	✓	100%	24135m	0%	0.7%	-15°
04:00	✕	100%	24135m	13%	0.7%	-7.6°
05:00	✕	100%	24135m	26%	0.7%	1.2°
06:00	✕	100%	24134m	39%	0.7%	11°
07:00	✕	100%	24135m	39%	0.7%	21°
08:00	✕	92%	24135m	39%	0.7%	32°
09:00	✕	97%	24134m	39%	0.7%	44°
10:00	✕	100%	24135m	42%	0.7%	55°
11:00	✕	94%	14360m	46%	0.7%	66°
12:00	✕	99%	14619m	49%	0.7%	76°
13:00	✕	94%	14565m	65%	0.7%	80°
14:00	✕	100%	24135m	59%	0.7%	73°
15:00	✕	97%	24135m	52%	0.7%	62°
16:00	✕	100%	24135m	60%	0.7%	51°
17:00	✕	100%	16218m	68%	0.7%	40°
18:00	✕	52%	24134m	76%	0.1%	28°
19:00	✕	37%	24134m	55%	0.1%	18°
20:00	✕	100%	24135m	27%	0.1%	7.6°
21:00	✕	79%	24135m	0%	0.1%	-1.8°
22:00	✓	44%	24135m	7.4%	0.1%	-10°
23:00	✓	12%	24134m	15%	0.1%	-17°
Mon, Jun 15
24:00	✓	100%	24135m	22%	0.1%	-22°
01:00	✓	100%	24134m	15%	0.1%	-24°
02:00	✓	100%	24134m	7.4%	0.1%	-24°
03:00	✓	25%	24135m	0%	0.1%	-21°
04:00	✕	33%	24135m	17%	0.1%	-15°
05:00	✕	64%	24134m	33%	0.1%	-8.2°
06:00	✕	7.6%	24134m	50%	0.1%	0.35°
07:00	✕	89%	24135m	43%	0.1%	9.9°
08:00	✕	62%	24134m	37%	0.1%	20°
09:00	✕	4.8%	24134m	30%	0.1%	31°
10:00	✕	4.7%	24134m	37%	0.1%	42°
11:00	✕	0%	24134m	43%	0.1%	53°
12:00	✕	0%	24134m	50%	0.1%	65°
13:00	✕	0%	24134m	33%	0.1%	75°
14:00	✕	2.4%	24134m	17%	0.1%	80°
15:00	✕	0.2%	24135m	0%	0.1%	74°
16:00	✕	0%	24135m	0%	0.1%	63°
17:00	✕	1.9%	24135m	0%	0.1%	52°
18:00	✕	1.7%	24134m	0%	2.6%	41°
19:00	✕	0%	24134m	0%	2.6%	30°
20:00	✕	0%	24135m	0%	2.6%	19°
21:00	✕	0%	24135m	0%	2.6%	8.3°
22:00	✓	0%	24134m	0%	2.6%	-1.3°
23:00	✓	4.2%	24134m	0%	2.6%	-9.9°
Tue, Jun 16
24:00	✓	0%	24135m	0%	2.6%	-17°
01:00	✓	0%	24135m	0%	2.6%	-22°
02:00	✓	2.5%	24135m	0%	2.6%	-25°
03:00	✓	0%	24135m	0%	2.6%	-25°
04:00	✕	0.1%	24134m	0%	2.6%	-22°
05:00	✕	5%	24135m	0%	2.6%	-17°
06:00	✕	58%	24135m	0%	2.6%	-10°
07:00	✕	16%	24134m	0%	2.6%	-1.9°
08:00	✕	5.2%	24135m	0%	2.6%	7.7°
09:00	✕	5.1%	24135m	0%	2.6%	18°
10:00	✕	5%	24135m	0%	2.6%	29°
11:00	✕	5%	24134m	0%	2.6%	40°
12:00	✕	2.5%	24134m	0%	2.6%	51°
13:00	✕	4.5%	24134m	0%	2.6%	62°
14:00	✕	1.7%	24135m	0%	2.6%	72°
15:00	✕	4.9%	24134m	0%	2.6%	77°
16:00	✕	5%	24134m	0%	2.6%	73°
17:00	✕	85%	24135m	0%	2.6%	63°
18:00	✕	100%	24135m	0%	7.8%	52°
19:00	✕	88%	24135m	0%	7.8%	40°
20:00	✕	0.2%	24135m	0%	7.8%	29°
21:00	✕	0%	24134m	0%	7.8%	18°
22:00	✓	0%	24135m	0%	7.8%	7.2°
23:00	✓	0%	24135m	0%	7.8%	-2.8°
Wed, Jun 17
24:00	✓	0%	24134m	0%	7.8%	-12°
01:00	✓	0%	24135m	0%	7.8%	-19°
02:00	✓	0%	24135m	0%	7.8%	-25°
03:00	✓	0%	24135m	0%	7.8%	-28°
04:00	✕	0%	24135m	0%	7.8%	-29°
05:00	✕	0%	24134m	0%	7.8%	-26°
06:00	✕	0%	24134m	0%	7.8%	-21°
07:00	✕	0%	24134m	0%	7.8%	-14°
08:00	✕	0%	24135m	0%	7.8%	-4.9°
09:00	✕	0%	24135m	0%	7.8%	5°
10:00	✕	0%	24135m	0%	7.8%	16°
11:00	✕	0%	24135m	0%	7.8%	27°
12:00	✕	0%	24135m	0%	7.8%	38°
13:00	✕	0.27%	24135m	0%	7.8%	49°
14:00	✕	0.53%	24135m	0%	7.8%	60°
15:00	✕	0.8%	24135m	0%	7.8%	69°
16:00	✕	0.53%	24135m	0%	7.8%	73°
17:00	✕	0.27%	24135m	0%	7.8%	69°
18:00	✕	0%	24135m	0%	16%	60°

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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