Best Time to Visit Chamonix-Mont-Blanc for Hiking – August Scores 70/100

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Outdoor activities Potential

70/100

Good

Based on optimal climate

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Seasonality

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Best Time

August, July, June

Avoid

Avoid (Extreme Weather)

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Weather

-4°C – 12°C

Avg Temp Range

Precipitation

Seasonal (check heatmap)

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Good For

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🥾 Planning a hiking trip to Chamonix-Mont-Blanc?

The best time to visit Chamonix-Mont-Blanc for hiking is August, July, June, when trail conditions are most favorable and the weather is more stable.

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hotel → Find top-rated stays near hiking areas in Chamonix-Mont-Blanc explore → Browse the best hiking tours and routes in Chamonix-Mont-Blanc

Climate Heatmap

See at a glance which months offer the best outdoor activities conditions — based on temperature, rainfall and climate scores.

Data: WorldClim 2.1 (1 km² climate normals) · CRU TS (variability) · World Bank ICP (price levels) · How our scores work

For hiking in Chamonix-Mont-Blanc, August, July, June score highest on this page; November and April rank lowest. Use the month table below to match your stay dates.

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Outdoor activities conditions breakdown

Monthly weather & climate data for Chamonix-Mont-Blanc

Month	Climate Score	Predictability	Avg Temp	Max Temp	Rain (mm)	Rain Days	Humidity	Season
January	30Poor Cool temperatures. High rain conditions.	Predictability 85Weather conditions are fairly consistent throughout the year.	-4°	-1°	121	14.9	76%	shoulder
February	34Poor Cool temperatures. Some rain conditions.	Predictability 85Weather conditions are fairly consistent throughout the year.	-4°	-1°	93	13.3	76%	shoulder
March	32Poor Cool temperatures. High rain conditions.	Predictability 85Weather conditions are fairly consistent throughout the year.	-1°	3°	105	14.5	73%	shoulder
April	26Poor Cool temperatures. High rain conditions.	Predictability 78Weather conditions vary somewhat by season.	2°	6°	142	17.7	69%	shoulder
May	26Poor Cool temperatures. High rain conditions.	Predictability 70Weather conditions vary somewhat by season.	7°	10°	159	18.5	69%	wet
June	54Suboptimal Cool temperatures. High rain conditions.	Predictability 78Weather conditions vary somewhat by season.	10°	14°	141	16.2	66%	shoulder
July	69Suboptimal Cool temperatures. High rain conditions.	Predictability 78Weather conditions vary somewhat by season.	12°	16°	161	15.4	65%	wet
August	70Good Cool temperatures. High rain conditions.	Predictability 85Weather conditions are fairly consistent throughout the year.	12°	16°	152	14.8	66%	wet
September	48Poor Cool temperatures. High rain conditions.	Predictability 78Weather conditions vary somewhat by season.	9°	12°	137	15.3	67%	shoulder
October	28Poor Cool temperatures. High rain conditions.	Predictability 78Weather conditions vary somewhat by season.	5°	8°	135	15.5	69%	shoulder
November	25Poor Cool temperatures. High rain conditions.	Predictability 78Weather conditions vary somewhat by season.	0°	3°	148	16.7	74%	shoulder
December	28Poor Cool temperatures. High rain conditions.	Predictability 85Weather conditions are fairly consistent throughout the year.	-3°	0°	139	14.5	70%	shoulder

Source: Historical climate averages (30-year observation).

Quick summary: visiting Chamonix-Mont-Blanc

When is the best time to visit Chamonix-Mont-Blanc for outdoor activities?

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August, July, June score highest for outdoor activities in Chamonix-Mont-Blanc. The top month scores 70/100; compare all 12 months below before locking dates.

When is the rainy season in Chamonix-Mont-Blanc?

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Rainy season typically: July–August. July, August still score among the stronger months for outdoor activities, so treat the wet season as a mixed period rather than a blanket rule-out. Compare the monthly score, rain and temperature together.