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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
Tue, Mar 17 · 03:00–05:01 · 2h window
Low confidence
38%
🌛Moon Altitude-30.5--10.1°
☁️Total Cloud Coverage5-14.4%
starry-night weather icon
Pristine Dark Skies (pristine)
Chamonix
Wed, Mar 18 · 01:00–04:59
🌛Moon Altitude:-47.2--23.5°
Low

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72-hour requirements breakdown

What passed or failed, hour by hour
5matching 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°
Thu, Mar 12
05:00100%40m39%39%9.8°
06:00100%122m39%39%14°
07:00100%1278m39%39%16°
08:0085%2426m55%39%15°
09:0056%10248m27%39%12°
10:0048%22827m0%39%7.8°
11:0039%24134m0%39%1.4°
12:005%24134m0%39%-6.4°
13:005%24135m0%39%-15°
14:0073%3931m0%39%-24°
15:0080%4024m0%39%-34°
16:0082%4607m0%39%-44°
17:0075%16247m0%39%-54°
18:0037%24135m0%39%-63°
19:008.3%24134m0%39%-70°
20:002.3%24134m0%39%-72°
21:005%24135m0%39%-67°
22:004.4%24135m0%39%-58°
23:001.2%24134m0%39%-49°
Fri, Mar 13
24:000.7%24135m0%39%-39°
01:005%24135m0%30%-29°
02:005%24135m0%30%-19°
03:005%24135m0%30%-9.7°
04:004.9%24134m0%30%-1.4°
05:004.4%24135m0%30%5.8°
06:005%24135m0%30%12°
07:0027%24134m0%30%15°
08:008%24135m0%30%17°
09:0055%24134m0%30%16°
10:0011%24134m0%30%13°
11:005%13696m0%30%8.2°
12:0080%13128m0%30%1.6°
13:00100%16131m0%30%-6.3°
14:00100%24134m0%30%-15°
15:00100%24135m0%30%-25°
16:00100%24134m0%30%-35°
17:00100%24134m0%30%-45°
18:00100%24135m0%30%-54°
19:00100%24135m0%30%-63°
20:00100%24135m13%30%-69°
21:00100%24135m26%30%-69°
22:00100%24134m39%30%-64°
23:00100%24134m48%30%-56°
Sat, Mar 14
24:00100%24134m57%30%-46°
01:0099%24135m66%22%-36°
02:00100%24135m78%22%-26°
03:00100%24135m89%22%-16°
04:00100%24135m100%22%-6.7°
05:00100%24134m100%22%1.7°
06:00100%24134m100%22%
07:00100%17808m100%22%15°
08:00100%77m100%22%18°
09:00100%58m100%22%20°
10:00100%45m100%22%19°
11:00100%39m100%22%15°
12:00100%43m100%22%9.8°
13:00100%54m100%22%2.8°
14:00100%70m100%22%-5.5°
15:00100%92m100%22%-15°
16:00100%104m100%22%-24°
17:00100%90m100%22%-34°
18:00100%82m100%22%-44°
19:00100%100m100%22%-53°
20:00100%118m100%22%-61°
21:00100%107m100%22%-66°
22:00100%93m100%22%-66°
23:00100%98m100%22%-60°
Sun, Mar 15
24:00100%136m99%22%-52°
01:00100%278m99%14%-42°
02:00100%997m86%14%-32°
03:00100%3448m73%14%-22°
04:00100%2823m60%14%-12°
05:00100%3323m65%14%-2.4°
06:00100%3671m71%14%6.1°
07:00100%11195m76%14%13°
08:0098%7658m78%14%19°
09:0095%4121m80%14%23°
10:0093%584m82%14%24°
11:0095%466m82%14%22°
12:0098%349m82%14%18°
13:00100%231m82%14%12°
14:0096%1021m68%14%4.7°
15:0092%1811m53%14%-4°
16:0087%2602m39%14%-13°
17:0092%7352m45%14%-23°
18:0096%12103m50%14%-33°
19:00100%16854m56%14%-43°
20:0078%16997m38%14%-52°
21:0056%17141m21%14%-59°
22:0035%17284m3.5%14%-62°
23:0032%17470m2.3%14%-61°
Mon, Mar 16
24:0030%17656m1.2%14%-55°
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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