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Rule Dark Skies

Grindelwald - Dark Skies - Alps

Grindelwald, Bern, 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)
Grindelwald
Today · 22:20–04:32 · 6h window
Medium confidence
54%
🌛Moon Altitude-11.4-36.1°
☁️Total Cloud Coverage0.3-5%
starry-night weather icon
Pristine Dark Skies (pristine)
Grindelwald
Tomorrow · 22:22–04:29
🌛Moon Altitude:-8-45.4°
Medium
starry-night weather icon
Pristine Dark Skies (pristine)
Grindelwald
Sat, Apr 25 · 03:00–04:24
🌛Moon Altitude:-1-8.4°
Low

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72-hour requirements breakdown

What passed or failed, hour by hour
14matching hours in the next 86 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°
Tue, Apr 21
06:0016%24135m0%21%-14°
07:0063%21591m0%21%-10°
08:004.7%24135m0%21%-4.9°
09:005%24134m59%21%
10:003.6%24135m80%21%10°
11:002.9%24135m100%21%19°
12:0015%24134m100%21%28°
13:0021%22842m100%21%38°
14:0043%20056m100%21%48°
15:0055%8789m68%21%57°
16:0064%11279m33%21%66°
17:0068%7116m0%21%71°
18:0072%3059m0%21%70°
19:0055%9043m0%21%64°
20:0049%13259m0%21%56°
21:0048%20022m0%21%46°
22:004.1%24134m0%21%36°
23:002.2%24134m0%21%26°
Wed, Apr 22
24:005%24134m0%21%17°
01:000.3%24135m0%21%8.2°
02:000.3%24134m0%32%0.39°
03:000.3%24135m0.3%32%-6.3°
04:001.1%24134m0.61%32%-11°
05:001.1%24135m0.91%32%-15°
06:001.1%24134m14%32%-16°
07:001.7%24135m26%32%-14°
08:001.9%24134m39%32%-11°
09:0013%23427m45%32%-5.9°
10:0013%24134m50%32%0.86°
11:0015%24135m56%32%8.8°
12:0015%24024m60%32%18°
13:008.3%24134m64%32%27°
14:0030%24135m69%32%37°
15:0024%20810m46%32%46°
16:007.2%16667m23%32%56°
17:0042%8984m0%32%64°
18:0049%15602m0%32%69°
19:0043%18136m0%32%69°
20:0027%13568m0%32%63°
21:007.1%23506m0%32%55°
22:0015%23458m0%32%45°
23:004.3%24135m0%32%35°
Thu, Apr 23
24:004.3%24135m0%32%26°
01:002.5%24135m0%32%16°
02:000.3%24134m0%43%7.1°
03:000.3%24135m0%43%-1.1°
04:000.3%24135m0%43%-8°
05:000.3%24135m0%43%-13°
06:000%24135m0%43%-17°
07:000%24135m0%43%-18°
08:000%24135m0%43%-17°
09:000%24135m0%43%-14°
10:000%24134m0%43%-8.2°
11:000%24135m0%43%-1.4°
12:001%24135m0%43%6.7°
13:000.6%24135m0%43%16°
14:009.8%14037m0%43%25°
15:0019%13901m0%43%35°
16:0022%13825m0%43%45°
17:0020%13813m0%43%54°
18:0021%13819m0%43%62°
19:0022%13830m0%43%66°
20:0044%697m0%43%66°
21:0036%1232m0%43%61°
22:001.1%24134m0%43%52°
23:000%24134m0%43%43°
Fri, Apr 24
24:000%24135m0%43%33°
01:003.2%24135m0%43%23°
02:005%24135m0%54%13°
03:0037%24135m0%54%3.9°
04:0068%24135m0%54%-4.5°
05:00100%24135m0%54%-12°
06:0082%24135m0%54%-17°
07:0065%24135m0%54%-21°
08:0047%24135m0%54%-22°
09:0057%24135m0%54%-21°
10:0066%24135m0%54%-17°
11:0076%24135m0%54%-11°
12:0069%24135m0%54%-4.2°
13:0063%24135m0%54%4.2°
14:0057%24135m0%54%13°
15:0041%24135m0%54%23°
16:0025%24135m0%54%33°
17:009.4%24135m0%54%42°
18:009.5%24135m0%54%51°
19:009.5%24135m0%54%58°
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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