Rule Dark Skies

Dark Skies Forecast for Canadian Rockies

Alberta / British Columbia, Canada

Astrophotography forecast for Canadian Rockies. Track dark sky conditions at Jasper Dark Sky Preserve.

65 matching opportunities in the 14-day forecast.

Upcoming Opportunities

When all conditions match, PhotoWeather marks an opportunity window.

Times shown in America/Edmonton

First upcoming window

Pristine Dark Skies (pristine)

Cochrane

Wed, Oct 7 · 20:52–23:00 · 2h window

Medium confidence

59%

🌛Moon Altitude-30.6--18.2°

☁️Total Cloud Coverage1-16%

Excellent Dark Skies (pristine)

Banff

Wed, Oct 7 · 20:56–21:00

🌛Moon Altitude:-17.6°

Medium

Excellent Dark Skies (pristine)

Castle Junction

Wed, Oct 7 · 20:57–21:00

🌛Moon Altitude:-17.4°

Medium

Good Dark Skies

Invermere

Wed, Oct 7 · 22:00–23:00

🌛Moon Altitude:-30.7°

High

Excellent Dark Skies (pristine)

Cochrane

Thu, Oct 8 · 24:00–01:00

🌛Moon Altitude:-34.1°

High

Good Dark Skies

Invermere

Thu, Oct 8 · 24:00–02:00

🌛Moon Altitude:-34.9--32.8°

Medium

Good Dark Skies

Cochrane

Thu, Oct 8 · 04:00–05:00

🌛Moon Altitude:-12.8°

Medium

+43 more windows in the next 14 days

Location status

0 of 10 locations matching now

Banff

Not matching

Banff opens onto Lake Louise and Moraine Lake, while Bow Valley fog inversions and Vermilion Lakes alpenglow shape layered mountain scenes.

Banff, Alberta, Canada

Blocked by: Total Cloud Coverage too high (100%, ≤ 20.0%)

Next opportunity in ~3h 41m

7 opportunities in the 14-day forecast

View forecast

Canmore

Not matching

Canmore sits below the Three Sisters and other steep limestone peaks, with the Bow River supplying bends, gravel bars, and calm reflections.

Canmore, Alberta, Canada

Blocked by: Total Cloud Coverage too high (100%, ≤ 20.0%)

Next opportunity in ~1 day 4h

6 opportunities in the 14-day forecast

View forecast

Kananaskis

Not matching

Kananaskis combines turquoise lakes, larch forests, broad valleys, and serrated peaks, with quieter shorelines for foreground-led compositions.

Kananaskis, Alberta, Canada

Blocked by: Total Cloud Coverage too high (100%, ≤ 20.0%)

Next opportunity in ~1 day 4h

7 opportunities in the 14-day forecast

View forecast

Castle Junction

Not matching

Castle Junction lies beneath Castle Mountain beside the Bow River, where braided channels, conifers, and valley mist create layered views.

Castle Junction, Alberta, Canada

Blocked by: Total Cloud Coverage too high (100%, ≤ 20.0%)

Next opportunity in ~3h 42m

9 opportunities in the 14-day forecast

View forecast

Cochrane

Not matching

Cochrane occupies rolling foothill country east of the Rockies, allowing prairie fences and open grassland to lead toward distant peaks.

Cochrane, Alberta, Canada

Blocked by: Astronomical Night: Outside time window

Next opportunity in ~3h 36m

11 opportunities in the 14-day forecast

View forecast

Miette

Not matching

The Miette area of Jasper features a narrow mountain valley, folded ridges, forests, and hot-springs terrain suited to compressed landscape layers.

Miette, Alberta, Canada

Blocked by: Total Cloud Coverage too high (100%, ≤ 20.0%)

Next opportunity in ~4 days 4h

3 opportunities in the 14-day forecast

View forecast

Nordegg

Not matching

Nordegg gives access to the North Saskatchewan valley, Abraham Lake's broad shoreline, Crescent Falls, and rugged eastern-slope ridges.

Nordegg, Alberta, Canada

Blocked by: Total Cloud Coverage too high (100%, ≤ 20.0%)

Next opportunity in ~4 days 4h

4 opportunities in the 14-day forecast

View forecast

Revelstoke

Not matching

Revelstoke is enclosed by the Selkirk and Monashee ranges, with the Columbia River, dense forest, and heavy winter snow shaping broad scenes.

Revelstoke, British Columbia, Canada

Blocked by: Total Cloud Coverage too high (30%, ≤ 20.0%)

Next opportunity in ~3 days 5h

6 opportunities in the 14-day forecast

View forecast

Invermere

Not matching

Invermere overlooks Lake Windermere in the Columbia Valley, where open water, wetlands, and parallel mountain ranges create deep compositions.

Invermere, British Columbia, Canada

Blocked by: Astronomical Night: Outside time window

Next opportunity in ~4h 44m

9 opportunities in the 14-day forecast

View forecast

Valemount

Not matching

Valemount sits in a broad valley near Mount Robson, offering long views across wetlands and forest toward layered northern Rocky Mountain peaks.

Valemount, British Columbia, Canada

Blocked by: Total Cloud Coverage too high (100%, ≤ 20.0%)

Next opportunity in ~3 days 4h

3 opportunities in the 14-day forecast

View forecast

What's blocking opportunities

95-hour forecast horizon; times in America/Edmonton.

Top 5 blocking conditions across 10 of 10 locations

Some blocked

Most blocked

6 Tue

7 Wed

8 Thu

9 Fri

10 Sat

Total Cloud Coverage (≤ 20.0%)

91% blocked

Astronomical Night (Any)

65% blocked

Precipitation Chance (≤ 10.0%)

44% blocked

Moon Altitude (≤ 10.0°)

40% blocked

Visibility (≥ 12000.0m)

30% blocked

How to read: Each row shows when a condition blocks opportunities. Stronger red means more locations are affected. These are the top 5 conditions preventing matches across the 95-hour forecast.

Astrophotography forecast for Canadian Rockies. Track dark sky conditions at Jasper Dark Sky Preserve.

This rule looks for true astronomical night, cloud cover no higher than 20%, visibility of at least 12 km, precipitation probability no higher than 10%, and either Moon illumination no higher than 35% or Moon altitude no higher than 10°. It does not calculate Galactic Centre or Milky Way core altitude; check a sky planner for the subject's position.

This forecast tracks astronomical darkness, cloud cover, visibility, precipitation probability, and moon interference at Jasper National Park—one of the world's largest accessible Dark Sky Preserves. Local Bortle darkness and astronomical seeing are not part of the rule and must be checked separately.

Jasper National Park covers over 11,000 square kilometers of protected darkness, with virtually no light pollution across the entire preserve. The combination of high elevation, dry continental air, and minimal artificial light makes this one of the finest astrophotography locations in North America.

What makes Jasper astrophotography exceptional:

Certified Dark Sky Preserve - Jasper holds one of the largest Dark Sky Preserve designations worldwide
Bortle 1-2 skies - True dark sky conditions where the Milky Way casts shadows and zodiacal light is visible
Mountain silhouettes - Dramatic peaks provide compelling foregrounds for Milky Way compositions
Accessibility - Unlike many dark sky locations, Jasper offers easy access with full services and accommodations

Best conditions occur during new moon periods from June through September, when the Milky Way galactic core is visible. Autumn brings earlier darkness and occasional aurora activity as a bonus. Popular locations include Medicine Lake, Pyramid Lake, and Maligne Lake, but nearly anywhere away from Jasper townsite offers exceptional darkness.

How this forecast is made

Opportunities are threshold-based signals: PhotoWeather checks whether forecast conditions match the rules for a photography scenario. They are planning guidance, not guarantees. Forecasts can change as new model runs arrive, and confidence generally decreases farther into the forecast horizon, so recheck conditions before travelling.

The weather forecast foundation comes through Open-Meteo , which aggregates models from weather agencies. PhotoWeather applies condition-specific thresholds and derived calculations; not every condition uses every model or data input.

How opportunities work → Weather data sources →

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