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Rule Dark Skies

St. Moritz - Dark Skies - Alps

Saint Moritz, Canton Grisons, 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)
St. Moritz
Tomorrow · 04:00–04:25 · 1h window
Medium confidence
61%
🌛Moon Altitude-12°
☁️Total Cloud Coverage3.4%
starry-night weather icon
Pristine Dark Skies (pristine)
St. Moritz
Tomorrow · 22:14–04:23
🌛Moon Altitude:-8.8-44.1°
Medium
starry-night weather icon
Excellent Dark Skies (pristine)
St. Moritz
Sun, Apr 26 · 04:00–04:16
🌛Moon Altitude:1.1°
Medium

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72-hour requirements breakdown

What passed or failed, hour by hour
9matching 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°
Mon, Apr 20
21:008.2%24135m0%12%34°
22:005%24134m0%12%24°
23:0025%11510m0%12%15°
Tue, Apr 21
24:0051%4274m0%12%6.4°
01:0060%15351m0%12%-1.1°
02:0070%3449m0%21%-7.4°
03:0064%391m0%21%-12°
04:0058%1000m0%21%-15°
05:0048%3532m0%21%-15°
06:0041%23288m13%21%-14°
07:0043%8826m26%21%-9.8°
08:0031%7232m39%21%-4.2°
09:0031%24134m53%21%2.8°
10:0021%24135m67%21%11°
11:0036%24135m80%21%20°
12:0058%22750m78%21%29°
13:0043%15993m76%21%39°
14:0054%18385m74%21%49°
15:0040%22083m55%21%59°
16:0019%24134m28%21%67°
17:0035%24134m0%21%71°
18:0071%24134m0%21%70°
19:0031%24135m0%21%63°
20:0027%24134m0%21%54°
21:0024%24134m3.3%21%45°
22:0017%6784m6.7%21%35°
23:0035%3776m10%21%25°
Wed, Apr 22
24:0041%3097m6.7%21%16°
01:0045%3086m3.3%21%7.1°
02:0042%3389m0%32%-0.6°
03:0023%14446m1.6%32%-7.1°
04:003.4%24134m3.3%32%-12°
05:003.1%24135m4.9%32%-15°
06:002.6%24134m3.3%32%-16°
07:001%24135m1.6%32%-14°
08:000%24134m0%32%-11°
09:000%24134m13%32%-5.2°
10:000.4%24134m26%32%1.7°
11:001.3%24135m39%32%9.8°
12:008.5%24134m39%32%19°
13:005.7%24134m39%32%28°
14:008.3%24135m39%32%38°
15:0024%24135m26%32%48°
16:0016%24135m13%32%57°
17:002.8%24135m0%32%65°
18:000.2%24135m0%32%70°
19:000%24134m0%32%69°
20:000.3%24134m0%32%63°
21:000%24134m0%32%54°
22:000%24134m0%32%44°
23:000%24135m0%32%34°
Thu, Apr 23
24:000%24135m0%32%24°
01:000%24135m0%32%15°
02:000%24134m0%43%5.9°
03:000%24135m0%43%-2.1°
04:000%24135m0%43%-8.8°
05:000%24135m0%43%-14°
06:000%24135m0%43%-17°
07:000%24135m0%43%-18°
08:000%24135m0%43%-17°
09:001.1%24135m0%43%-13°
10:005%24134m0%43%-7.5°
11:005%24135m0%43%-0.49°
12:004.3%24135m0%43%7.7°
13:005%24135m0%43%17°
14:005%24134m0%43%26°
15:005%24135m0%43%36°
16:000%24135m0%43%46°
17:000%24134m0%43%55°
18:000%24135m0%43%63°
19:000%24134m0%43%67°
20:005%24134m0%43%66°
21:001.3%24134m0%43%60°
22:005%24134m0%43%51°
23:005.1%24134m0%43%42°
Fri, Apr 24
24:0027%24135m0%43%32°
01:00100%24135m0%43%22°
02:00100%24135m0%54%12°
03:0068%24135m0%54%2.8°
04:0037%24135m0%54%-5.5°
05:005%24135m0%54%-13°
06:005%24135m0%54%-18°
07:005%24135m0%54%-21°
08:005%24135m0%54%-22°
09:0024%24135m0%54%-20°
10:0042%24135m0%54%-17°
11:0061%24135m0%54%-11°
12:0042%24135m0%54%-3.3°
13:0024%24135m0%54%5.2°
14:005%24135m0%54%14°
15:005%24135m0%54%24°
16:005%24135m0%54%34°
17:005%24135m0%54%44°
18:0019%24135m0%54%52°
19:0033%24135m0%54%59°
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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