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Rule Dark Skies

Ribblehead Viaduct - Dark Skies - Yorkshire Dales

Ribblehead, England, United Kingdom

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/London
Next opportunity
Excellent Dark Skies (pristine)
Ribblehead Viaduct
Tue, Apr 7 · 24:00–01:00 · 1h window
Medium confidence
55%
🌛Moon Altitude-11.9°
☁️Total Cloud Coverage7.1%
starry-night weather icon
Pristine Dark Skies (pristine)
Ribblehead Viaduct
Tue, Apr 7 · 03:00–04:14
🌛Moon Altitude:4.8-7.4°
Low

What this forecast looks for

Plain-language explanation from the rule

This forecast identifies optimal conditions for astrophotography in the Yorkshire Dales Dark Sky Reserve—one of only a few International Dark Sky Reserves in England. We track moon phase, cloud cover, atmospheric transparency, and light pollution to predict when Milky Way photography and star trails capture this protected dark-sky region.

Designated in 2020, the Yorkshire Dales Dark Sky Reserve protects some of England's darkest skies from light pollution. The combination of minimal artificial light, high elevation, and iconic landscape features like Ribblehead Viaduct and limestone formations creates exceptional opportunities for nightscape photography. The reserve covers much of the northern Dales, including the Ribblehead area, Malham, and the Three Peaks.

What makes Yorkshire Dales astrophotography special:

  • Dark Sky Reserve status - Official recognition and protection from light pollution in the northern Dales
  • Ribblehead Viaduct - Iconic 24-arch structure under the Milky Way provides unique compositions
  • Limestone foregrounds - Malham Cove and pavement areas offer dramatic geological features under stars
  • Historic structures - Bolton Abbey ruins, field barns, and traditional stone walls under night skies

Ribblehead Viaduct with the Milky Way arching above represents one of Britain's most sought-after astrophotography compositions—the Victorian engineering marvel under pristine stars. The limestone pavement at Malham provides otherworldly foreground textures for nightscape photography, with geometric rock patterns under star fields. Bolton Abbey's medieval ruins take on ghostly quality under moonlight or starlight, especially when light-painted. Pen-y-ghent's summit offers 360-degree dark skies, though wind can be challenging. Traditional field barns scattered across high pastures make excellent foregrounds for Milky Way compositions. The Buttertubs Pass provides high-elevation dark-sky access. New moon periods or just after last quarter are ideal—even partial moonlight impacts Milky Way visibility. Summer offers the Milky Way core, but winter provides darker, clearer skies and constellations like Orion. Dress warmly—Dales nights are cold even in summer at elevation. Check aurora forecasts too—strong displays are occasionally visible from high Dales locations.

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72-hour requirements breakdown

What passed or failed, hour by hour
3matching hours in the next 95 hoursJump to next match
OR logic: one branch per group is enough
Meets requirement
Misses requirement
Time
Europe/London
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°
Sat, Apr 4
03:005%24135m26%94%18°
04:005%24134m39%94%15°
05:0012%24134m57%94%11°
06:0078%24134m75%94%5.4°
07:0065%24135m93%94%-1.6°
08:00100%1561m88%94%-9.4°
09:00100%8167m85%94%-18°
10:00100%119m82%94%-26°
11:00100%102m86%94%-35°
12:00100%24134m90%94%-43°
13:00100%24134m95%94%-50°
14:00100%24135m96%94%-54°
15:00100%24135m97%94%-56°
16:0058%24135m99%94%-54°
17:00100%24134m99%94%-49°
18:00100%24134m99%94%-42°
19:00100%24135m99%94%-35°
20:00100%22662m88%94%-26°
21:00100%6424m76%94%-18°
22:0020%24134m64%94%-10°
23:0080%24135m70%94%-2.7°
Sun, Apr 5
24:00100%6065m77%94%3.7°
01:00100%1241m83%89%8.7°
02:00100%13520m83%89%12°
03:00100%22681m83%89%13°
04:0099%12774m83%89%13°
05:0079%24134m87%89%10°
06:0092%24135m92%89%
07:0079%19007m96%89%0.21°
08:0094%18827m91%89%-6.8°
09:0097%414m87%89%-15°
10:00100%4384m82%89%-23°
11:0070%16015m85%89%-31°
12:0032%20020m88%89%-40°
13:0080%20541m92%89%-48°
14:00100%23134m74%89%-55°
15:00100%22480m57%89%-59°
16:0072%23882m39%89%-60°
17:0093%23872m45%89%-57°
18:0046%24134m50%89%-51°
19:0065%24135m56%89%-44°
20:0068%24135m37%89%-36°
21:0037%24135m19%89%-27°
22:0099%24134m0%89%-19°
23:0078%24134m0%89%-11°
Mon, Apr 6
24:00100%24134m0%89%-4.3°
01:0099%24134m0%82%1.7°
02:0097%24135m0%82%6.3°
03:0083%24134m0%82%9.2°
04:00100%24135m0%82%10°
05:00100%23561m0%82%9.4°
06:00100%24135m0%82%6.6°
07:00100%24134m0%82%2.1°
08:00100%24134m0%82%-3.7°
09:00100%24134m0%82%-11°
10:00100%24134m0%82%-18°
11:0084%24134m0%82%-27°
12:00100%24134m0%82%-35°
13:0079%24134m0%82%-44°
14:0050%24134m0%82%-52°
15:0078%24134m0%82%-58°
16:00100%24134m0%82%-62°
17:00100%24134m0%82%-62°
18:00100%24135m0%82%-58°
19:00100%24135m0%82%-52°
20:00100%24134m0%82%-44°
21:00100%24134m0%82%-36°
22:0073%24135m0%82%-28°
23:0020%24134m0%82%-20°
Tue, Apr 7
24:007.1%24134m0%82%-12°
01:0052%24135m0%75%-5.1°
02:0032%24134m0%75%0.54°
03:005%24135m0%75%4.8°
04:005%24135m0%75%7.4°
05:004.8%24134m0%75%8.2°
06:003.7%24134m0%75%7.1°
07:005%24135m0%75%4.1°
08:0026%24135m0%75%-0.47°
09:0047%24135m0%75%-6.4°
10:0068%24135m0%75%-13°
11:0077%24135m17%75%-21°
12:0085%24135m33%75%-29°
13:0094%24135m50%75%-38°
14:0090%24135m67%75%-46°
15:0085%24135m83%75%-54°
16:0081%24135m100%75%-60°
17:0086%24135m100%75%-64°
18:0090%24135m100%75%-63°
19:0095%24135m100%75%-59°
20:0086%24135m74%75%-52°
21:0077%24135m48%75%-44°
22:0068%24135m22%75%-36°
23:0078%24135m22%75%-27°
Wed, Apr 8
24:0089%24135m22%75%-19°
01:00100%24135m22%66%-12°
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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