Weather forecast builder for the Tour du Mont Blanc

Plan your walk with weather from 17 years of history—choose towns and dates below.

About weather on the Tour du Mont Blanc

Tour du Mont Blanc sees a rapid seasonal swing, with summer bringing open passes, long daylight, broadly reliable logistics, and active transport links. June, July, and August offer generally straightforward travel, with long daylight, open passes, and full hut and transport services. Outside this window the character shifts quickly, with September cooling and winter months dominated by snow, short days, and limited services, turning into a ski or winter‑mountaineering season with avalanche concerns and very cold temperatures.

• Deep winter brings frequent snowstorms, long cloudy spells, brief crisp clearings, very cold temperatures, short daylight, and stronger winds on high passes.
• Spring is unsettled and changeable, with frequent showers, lingering snow on high passes, chilly mornings, and brief brighter windows between passing systems.
• Summer delivers warm valleys and cooler ridges, many fair mornings, building cloud, passing showers or short afternoon storms, and generally open high passes.
• Autumn turns cooler and more unsettled, with quick-moving showers, overcast stretches, first snows on higher paths, shortening days, and services tapering later.

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