Grosses Wannenhorn
Mountain Alpine peak in Valais with glaciated north face
A high Alpine peak in Valais within the Bernese Alps region, visited by climbers for glacier travel and mixed rock-and-ice routes. Parties approach via established alpine glaciers and huts for technical ascents.
Grosses Wannenhorn is a mountain in the Bernese Alps located in the canton of Valais, Switzerland. It is a high glaciated peak that forms part of the alpine skyline above the Aletsch region.
The mountain is primarily visited by experienced mountaineers and ski tourers who use its routes for alpine climbs and glacier travel. Routes access glaciers and steep snow and ice faces; objective hazards and glacier travel skills are required.
The peak has been part of the development of alpine mountaineering in the region since the 19th century and has seen routes established by climbers over successive decades. Technical routes and glacier approaches have been adapted as equipment and techniques evolved.
The summit sits in southern Valais within the Bernese Alps, overlooking parts of the Aletsch glacier system. The nearest larger settlements are in the Valais canton; access is typically from alpine valleys and mountain huts in the region.
How to Get to Grosses Wannenhorn #
Approaches typically start from Valais valley towns such as Fiesch or Oberwald, depending on route. Access by car or regional rail to trailheads followed by multi-day glacier travel is standard; consult Swiss Alpine Club guides.
Tips for Visiting Grosses Wannenhorn #
- Approach via the Oberwald or Fiesch valleys depending on route planning; glacier travel skills are required for many routes.
- Consult Swiss Alpine Club route descriptions and local guides for up-to-date conditions and crevasse maps.
- Respect alpine weather: afternoons often bring convective storms in summer.
Best Time to Visit Grosses Wannenhorn #
Summer is the primary season for ascents; always plan for snow and rapidly changing conditions.
Weather & Climate near Grosses Wannenhorn #
Grosses Wannenhorn's climate is classified as Tundra - Tundra climate with cold summers (peaking in August) and freezing winters (coldest in February). Temperatures range from -16°C to 1°C. Moderate rainfall (504 mm/year).
January
January is freezing with highs of -10°C and lows of -15°C. Moderate rainfall (49 mm), partly cloudy skies, and breezy conditions.
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February
February is the coldest month with highs of -11°C and lows of -16°C. Moderate rainfall (43 mm), partly cloudy skies, and breezy conditions.
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March
March is freezing with highs of -11°C and lows of -16°C. The wettest month with 52 mm of rain, partly cloudy skies, and breezy conditions.
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April
April is freezing with highs of -10°C and lows of -14°C. Moderate rainfall (36 mm), mostly overcast skies, and breezy conditions.
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May
May is freezing with highs of -5°C and lows of -10°C. Moderate rainfall (32 mm), mostly overcast skies, and breezy conditions.
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June
June is freezing with highs of -3°C and lows of -6°C. Moderate rainfall (38 mm), mostly overcast skies, and breezy conditions.
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July
July is freezing with highs of 0°C and lows of -2°C. Moderate rainfall (47 mm), partly cloudy skies, and breezy conditions.
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August
August is cold with highs of 1°C and lows of -1°C. Moderate rainfall (49 mm) and partly cloudy skies.
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September
September is freezing with highs of -1°C and lows of -4°C. Moderate rainfall (42 mm), partly cloudy skies, and breezy conditions.
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October
October is freezing with highs of -4°C and lows of -7°C. Moderate rainfall (31 mm), partly cloudy skies, and breezy conditions.
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November
November is freezing with highs of -7°C and lows of -11°C. Moderate rainfall (44 mm), partly cloudy skies, and breezy conditions.
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December
December is freezing with highs of -9°C and lows of -14°C. Moderate rainfall (41 mm), partly cloudy skies, and breezy conditions.
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