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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
pristinedarkskies weather icon
Next opportunity
Pristine Dark Skies (pristine)
Chamonix
Today · 23:55–03:00 · 3h window
Medium confidence
46%
🌛Moon Altitude-25.1-5.2°
☁️Total Cloud Coverage1.6-10.6%
pristinedarkskies weather icon
Pristine Dark Skies (pristine)
Chamonix
Tomorrow · 23:57–03:00
🌛Moon Altitude:-28.1-2.4°
Medium

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72-hour requirements breakdown

What passed or failed, hour by hour
8matching hours in the next 95 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°
Fri, Jun 5
04:00✕100%1926m100%78%21°
05:00✕99%1950m100%78%23°
06:00✕97%2356m100%78%23°
07:00✕89%4468m100%78%20°
08:00✕82%6150m100%78%15°
09:00✕83%8571m99%78%7.9°
10:00✕81%20673m99%78%-0.28°
11:00✕83%19772m98%78%-9.4°
12:00✕84%9516m98%78%-19°
13:00✕97%20195m98%78%-29°
14:00✕100%18601m98%78%-39°
15:00✕100%23310m76%78%-48°
16:00✕100%21052m52%78%-56°
17:00✕100%24135m29%78%-62°
18:00✕100%24134m32%78%-62°
19:00✕71%24135m36%78%-58°
20:00✕95%24135m40%78%-51°
21:00✕92%24134m15%78%-41°
22:00✕95%24135m7.4%78%-31°
23:00✓73%24135m0%78%-21°
Sat, Jun 6
24:00✓28%24134m0%78%-11°
01:00✓95%24134m0%78%-1.3°
02:00✓100%24134m0%69%7.7°
03:00✓100%24135m0%69%16°
04:00✕100%24135m0%69%22°
05:00✕100%24134m0%69%26°
06:00✕100%24135m0%69%28°
07:00✕100%24135m0%69%27°
08:00✕99%24134m0%69%23°
09:00✕100%24134m0%69%17°
10:00✕93%24134m0%69%9.8°
11:00✕81%24134m0%69%1.1°
12:00✕79%24135m13%69%-8.4°
13:00✕32%24135m26%69%-18°
14:00✕5%24135m39%69%-28°
15:00✕5.6%24134m26%69%-38°
16:00✕5%24134m13%69%-47°
17:00✕5.6%24135m0%69%-54°
18:00✕98%24135m0%69%-57°
19:00✕97%24134m0%69%-57°
20:00✕4.5%24135m0%69%-52°
21:00✕6.9%24134m0%69%-44°
22:00✕8.3%24135m0%69%-35°
23:00✓11%24134m0%69%-25°
Sun, Jun 7
24:00✓8.9%24134m0%69%-15°
01:00✓1.6%24134m0%69%-4.6°
02:00✓4.6%24134m0%59%5.2°
03:00✓4.6%24134m0%59%14°
04:00✕4.7%24135m0%59%22°
05:00✕5%24135m0%59%28°
06:00✕5%24134m0%59%32°
07:00✕5.4%24135m0%59%33°
08:00✕5%24134m0%59%31°
09:00✕5.2%24134m4.4%59%27°
10:00✕5%24134m8.8%59%20°
11:00✕44%24135m13%59%12°
12:00✕44%24134m22%59%2.6°
13:00✕79%24135m30%59%-7.1°
14:00✕72%24135m39%59%-17°
15:00✕53%24135m26%59%-27°
16:00✕34%23221m13%59%-36°
17:00✕56%24134m0%59%-44°
18:00✕100%24135m0%59%-50°
19:00✕96%24135m0%59%-52°
20:00✕31%24134m0%59%-50°
21:00✕8%24135m0%59%-45°
22:00✕5%24135m0%59%-37°
23:00✓4.7%24134m0%59%-28°
Mon, Jun 8
24:00✓5%24134m0%59%-18°
01:00✓5%24135m0%59%-7.8°
02:00✓5%24134m0%50%2.4°
03:00✓4.4%24134m0%50%12°
04:00✕4.6%24134m0%50%21°
05:00✕15%24134m0%50%29°
06:00✕21%24135m0%50%35°
07:00✕7.6%24135m0%50%39°
08:00✕64%24135m0%50%39°
09:00✕74%24135m0%50%36°
10:00✕83%24135m0%50%30°
11:00✕93%24135m0%50%23°
12:00✕95%24135m14%50%14°
13:00✕98%24135m28%50%4.4°
14:00✕100%24135m42%50%-5.6°
15:00✕100%18347m57%50%-15°
16:00✕100%12559m72%50%-25°
17:00✕100%6771m87%50%-33°
18:00✕100%9695m90%50%-40°
19:00✕100%12618m92%50%-45°
20:00✕100%15541m95%50%-46°
21:00✕91%16887m84%50%-43°
22:00✕82%18233m73%50%-38°
23:00✓73%19579m61%50%-30°
Tue, Jun 9
24:00✓82%17086m67%50%-21°
01:00✓91%14593m73%50%-11°
02:00✓100%12100m79%38%-0.53°
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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