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Rule Dark Skies

Chamonix - Dark Skies - Alps

Chamonix, Auvergne-Rhône-Alpes, France

Moonless nights with crystal-clear skies for deep-sky photography

Upcoming Opportunities

When all conditions match, PhotoWeather marks an opportunity window.

Times shown in Europe/Zurich
Next opportunity
Pristine Dark Skies (pristine)
Chamonix
Sat, Mar 7 · 20:06–01:00 · 5h window
Medium confidence
40%
🌛Moon Altitude-31.3-6.4°
☁️Total Cloud Coverage1.3-2.9%

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72-hour requirements breakdown

What passed or failed, hour by hour
6matching hours in the next 92 hoursJump to next match
OR logic: one branch per group is enough
Meets requirement
Misses requirement
Time
Europe/Zurich
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°
Wed, Mar 4
05:00✓2.1%24134m0%99%24°
06:00✕2.1%24134m0%99%14°
07:00✕1.6%24134m0%99%4°
08:00✕1.7%24135m0%99%-6.2°
09:00✕0.4%24135m0%99%-16°
10:00✕0%24134m0%99%-26°
11:00✕0%24135m0%99%-34°
12:00✕0.7%24134m0%99%-40°
13:00✕3.8%24134m0%99%-44°
14:00✕5.5%24134m0%99%-44°
15:00✕7.1%24134m0%99%-40°
16:00✕8.9%24135m0%99%-34°
17:00✕8.7%24135m0%99%-26°
18:00✕10%24135m0%99%-17°
19:00✕8.9%24135m0%99%-7.6°
20:00✓5%24135m0%99%2.3°
21:00✓42%24134m0%99%12°
22:00✓40%24134m0%99%21°
23:00✓25%24135m0%99%29°
Thu, Mar 5
24:00✓43%24135m0%99%36°
01:00✓17%24134m0%96%40°
02:00✓5%24135m0%96%41°
03:00✓5%24134m0%96%38°
04:00✓5%24134m0%96%33°
05:00✓18%24134m0%96%25°
06:00✕98%24135m0%96%17°
07:00✕91%24134m0%96%6.8°
08:00✕100%24135m0%96%-3.4°
09:00✕100%24135m0%96%-14°
10:00✕100%24134m0%96%-24°
11:00✕100%24134m0%96%-33°
12:00✕100%24134m0%96%-41°
13:00✕100%24135m0%96%-47°
14:00✕80%24134m0%96%-50°
15:00✕77%24134m0%96%-49°
16:00✕85%24134m0%96%-45°
17:00✕84%24135m0%96%-37°
18:00✕82%24135m0%96%-29°
19:00✕87%24135m0%96%-19°
20:00✓100%24134m0%96%-9.2°
21:00✓99%24134m0%96%0.67°
22:00✓96%24134m0%96%10°
23:00✓96%24134m0%96%19°
Fri, Mar 6
24:00✓100%24135m0%96%26°
01:00✓100%24134m0%90%32°
02:00✓100%24135m0%90%34°
03:00✓100%24135m0%90%34°
04:00✓100%24134m0%90%31°
05:00✓100%24134m0%90%26°
06:00✕100%24134m0%90%18°
07:00✕100%24135m0%90%9.2°
08:00✕100%24134m0%90%-0.51°
09:00✕100%24135m0%90%-11°
10:00✕100%24134m0%90%-21°
11:00✕100%24134m0%90%-31°
12:00✕100%24135m0%90%-40°
13:00✕100%24134m0%90%-49°
14:00✕100%24134m0%90%-54°
15:00✕96%24135m0%90%-56°
16:00✕100%24134m0%90%-54°
17:00✕100%24134m0%90%-48°
18:00✕100%24134m0%90%-40°
19:00✕100%24135m0%90%-30°
20:00✓100%24135m0%90%-20°
21:00✓100%24134m0%90%-10°
22:00✓100%24134m0%90%-0.81°
23:00✓100%24134m0%90%8.2°
Sat, Mar 7
24:00✓100%24135m0%90%16°
01:00✓100%24135m0%84%23°
02:00✓100%24135m0%84%27°
03:00✓100%24135m0%84%29°
04:00✓100%24134m0%84%28°
05:00✓100%24135m0%84%25°
06:00✕100%24134m0%84%19°
07:00✕100%24135m0%84%11°
08:00✕95%24135m0%84%2.4°
09:00✕91%24135m0%84%-7.2°
10:00✕86%24135m0%84%-17°
11:00✕59%24135m13%84%-28°
12:00✕32%24135m26%84%-38°
13:00✕5%24135m39%84%-47°
14:00✕5.6%24135m26%84%-55°
15:00✕6.2%24135m13%84%-60°
16:00✕6.8%24135m0%84%-61°
17:00✕5.7%24135m0%84%-57°
18:00✕4.7%24135m0%84%-50°
19:00✕3.6%24135m0%84%-41°
20:00✓2.9%24135m0%84%-31°
21:00✓2.1%24135m0%84%-21°
22:00✓1.4%24135m0%84%-11°
23:00✓1.4%24135m0%84%-2.1°
Sun, Mar 8
24:00✓1.3%24135m0%84%6.4°
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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