Weather: UTMB CCC (Ultra-Trail du Mont-Blanc - Marathon Distance)
Historical weather data for race day in August. Use this to plan your race strategy, clothing, and hydration.
14°C
Temperature
Range: 8°C – 20°C
65%
Humidity
Moderate
35%
Rain Chance
Possible — check forecast
August
Typical race month
Usually on a Saturday
Conditions
Late summer alpine conditions with cool temperatures and variable weather. Afternoon thunderstorms are possible in the mountains; runners must be prepared for rapid weather changes and exposed ridges.
What to Wear
Singlet or short sleeve
Ideal racing temperatures
Hydration Strategy
Before the Race
Normal hydration. Drink to thirst in the 24 hours before. Avoid over-hydrating.
During the Race
Drink at aid stations every 3-4km. Alternate water and sports drink.
After the Race
Rehydrate within 30 minutes of finishing. A drink with electrolytes and some protein helps recovery.
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