Weather: Marathon du Mont-Blanc
Typical climate in June (an estimate, not measured race-day data). Use it to plan your race strategy, clothing, and hydration.
Typical climate for the race month — an estimate, not a forecast or a race-day record
14°C
Temperature
Range: 8°C – 21°C
65%
Humidity
Moderate
42%
Rain Chance
Possible — check forecast
June
Typical race month
Usually on a Sunday
Conditions
Late June in Chamonix is mild in the valley: highs average about 21°C and lows about 7.5°C, with rain of 1 mm or more on around 13 days of the month.
What to Wear
Singlet or short sleeve
Ideal racing temperatures
Hat with brim
Keep rain out of your eyes
Anti-chafe cream
Wet conditions increase chafing risk
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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