Things to Do in Chamonix in August
August weather, activities, events & insider tips
August Weather in Chamonix
Temperature, rainfall and humidity at a glance
Is August Right for You?
Weigh the advantages and considerations before booking
- + When the lifts reopen after winter's lock-out, the Vallée Blanche route drops 20 km (12.4 miles) of crevassed ice at your feet. Mont Blanc throws its 3,842 m (12,605 ft) shadow over the Mer de Glace while you pick a line between sapphire cracks.
- + Thermals build like clockwork after lunch, good for a 2,000 m (6,562 ft) launch off Planpraz. Expect 45 minutes of spirals above the valley floor before you touch down in the square.
- + Kitchens across town fire up tartiflette once the reblochon hits its stride. Wheels aged since spring reach peak ripeness in August after four months in cave silence.
- + UTMB qualifiers turn the village into an aid station. Spectators clog the streets as runners stamp past Église Saint-Michel, bells clanging overhead like a cowbell chorus.
- + Lac Blanc stays locked at 14°C (57°F) even when noon bakes the valley. The 2-hour approach from Flegère keeps the crowd thin, winter's snowmelt crowd is long gone.
- − Cable-car queues snake past the bakery on Rue Joseph Vallot by 7:30 AM sharp. August packs 40% more bodies than July as European families squeeze in before the school bell rings.
- − Thunder rolls in around 3 PM like artillery practice. Echoes bounce between the Aiguilles Rouges and send hikers diving into every hut that sells soup.
- − Room rates top out for the year. That same chambre at Hôtel l'Arveyron, half-price in May, now demands six weeks' advance ransom.
Best Activities in August
Top things to do during your visit
August strips the snow bridges and flaunts ice you'll never see in winter. The Mer de Glace coughs up 100-meter (328-foot) crevasses with sapphire walls that ring like wine glasses when you tap them with an axe. Guides start the day at 6 AM to catch the 8:30 AM cable car, dodging both the queue and the slush that swallows crampons after lunch.
By August the rock is bone-dry. Le Grand Dru dishes out 300-meter (984-foot) of air with cables already bolted for civilians. You clip in and climb until the west face catches the 11 AM furnace.
Only in August do the high lakes thaw enough for a dare-you dip. Lac Blanc at 2,500 m (8,202 ft) stays icy but doable after the 4-hour haul from Index lift; Mont Blanc floats on the surface like a mirror shard.
August turns the 42 km (26.1 miles) loop around Mont Blanc into a moving carnival. UTMB hopefuls, support vans, and cowbells create a trail-side party even if you're only jogging the 500-800 m (1,640-2,625 ft) training sections.
Thermals hit their ceiling in August, stretching flights to 45-60 minutes instead of the standard 20. Launch from Planpraz, rise over pine forests, and watch Mont Blanc's glaciers glint like polished steel before landing in the town square.
August bakes the singletrack dry. Drop 1,500 m (4,921 ft) from Le Brévent to Chamonix over 20 km (12.4 miles) of granite and thyme-scented meadows. Bike parks spin lifts until 6 PM, last gondola at 5:30.
August Events & Festivals
What's happening during your visit
From August 24-30 the Ultra-Trail du Mont-Blanc turns Chamonix into trail running's Wimbledon. Ten thousand runners from 100 countries circle 170 km (105.6 miles) while the valley parties straight through the weekend finish-line waves.
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Essential Tips
Insider knowledge and common pitfalls to avoid
Book Experiences in Chamonix
Top-rated things to do in Chamonix this August
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