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Rule Dark Skies

Zermatt - Dark Skies - Alps

Zermatt, Valais, Switzerland

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)
Zermatt
Sat, Mar 7 · 20:03–01:00 · 5h window
Low confidence
38%
🌛Moon Altitude-30.6-6.9°
☁️Total Cloud Coverage1.4-5.1%

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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✓0%24134m0%99%23°
06:00✕0%24134m0%99%14°
07:00✕0%24134m0%99%3.4°
08:00✕0%24135m0%99%-6.8°
09:00✕0%24135m0%99%-17°
10:00✕0%24134m0%99%-26°
11:00✕0.2%24135m0%99%-34°
12:00✕3.6%24134m0%99%-40°
13:00✕13%24134m0%99%-44°
14:00✕16%24134m0%99%-44°
15:00✕46%24134m0%99%-40°
16:00✕65%24135m0%99%-34°
17:00✕62%16991m0%99%-26°
18:00✕50%15359m0%99%-17°
19:00✓19%24135m0%99%-7°
20:00✓24%24135m0%99%2.9°
21:00✓35%24134m0%99%13°
22:00✓76%11672m0%99%22°
23:00✓82%20893m0%99%30°
Thu, Mar 5
24:00✓60%24135m0%99%36°
01:00✓99%24134m0%96%40°
02:00✓14%24135m0%96%41°
03:00✓33%24134m0%96%38°
04:00✓5%24134m0%96%32°
05:00✓5%24134m0%96%25°
06:00✕84%24135m0%96%16°
07:00✕100%24134m0%96%6.2°
08:00✕100%24135m0%96%-4°
09:00✕100%24135m0%96%-14°
10:00✕100%24134m0%96%-24°
11:00✕100%24134m0%96%-34°
12:00✕100%24134m0%96%-42°
13:00✕100%23138m0%96%-48°
14:00✕100%24134m0%96%-50°
15:00✕100%23566m0%96%-49°
16:00✕100%24134m0%96%-44°
17:00✕95%24135m0%96%-37°
18:00✕90%7215m0%96%-28°
19:00✕61%7777m0%96%-19°
20:00✓100%7291m0%96%-8.6°
21:00✓90%10516m0%96%1.2°
22:00✓96%24134m0%96%11°
23:00✓98%4587m0%96%19°
Fri, Mar 6
24:00✓99%5464m0%96%26°
01:00✓100%8001m0%90%32°
02:00✓100%5718m0%90%34°
03:00✓100%5697m0%90%34°
04:00✓100%10800m0%90%31°
05:00✓100%17598m0%90%25°
06:00✕100%5978m0%90%17°
07:00✕100%4370m0%90%8.6°
08:00✕100%7332m0%90%-1.1°
09:00✕100%24135m0%90%-11°
10:00✕100%24134m0%90%-22°
11:00✕100%24134m0%90%-32°
12:00✕69%24135m0%90%-41°
13:00✕100%24134m0%90%-49°
14:00✕67%24134m0%90%-54°
15:00✕92%24135m0%90%-56°
16:00✕87%24134m0%90%-53°
17:00✕96%24134m0%90%-47°
18:00✕100%10562m0%90%-39°
19:00✕100%5257m0%90%-30°
20:00✓100%24135m0%90%-20°
21:00✓100%24134m0%90%-9.9°
22:00✓100%10300m0%90%-0.26°
23:00✓100%24134m0%90%8.7°
Sat, Mar 7
24:00✓100%24135m0%90%17°
01:00✓99%24135m0%84%23°
02:00✓89%24135m0%84%27°
03:00✓99%24135m0%84%29°
04:00✓73%24134m0%84%28°
05:00✓70%24135m0%84%24°
06:00✕94%24134m0%84%18°
07:00✕82%24135m0%84%11°
08:00✕81%24135m0%84%1.8°
09:00✕80%24135m0%84%-7.8°
10:00✕78%24135m0%84%-18°
11:00✕74%18470m0%84%-28°
12:00✕70%12805m0%84%-38°
13:00✕66%7140m0%84%-48°
14:00✕46%12805m0%84%-55°
15:00✕25%18470m0%84%-61°
16:00✕4.3%24135m0%84%-61°
17:00✕4.8%24135m0%84%-57°
18:00✕5.4%24135m0%84%-49°
19:00✕5.9%24134m0%84%-40°
20:00✓5.1%24135m0%84%-31°
21:00✓4.3%24135m0%84%-21°
22:00✓3.5%24135m0%84%-11°
23:00✓2.4%24135m0%84%-1.6°
Sun, Mar 8
24:00✓1.4%24135m0%84%6.9°
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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