France
Chamonix in August: weather & travel advice
This month's data profile
Rain shapes the decision
Chamonix in August is climatically well suited to city breaks and active holidays and hiking. The average daily high is around 18 °C. With about 14 rainy days it is wet.
Historical monthly averages, not a weather forecast. Individual days and years can differ substantially.
Rank among 12 monthly averages
64/100 · #1
Warmth
#1
Dryness
#7
Sun
#3
Published best categories: Overall, City break, Active
Chamonix · AugustPhoto: Alain Bourque · CC BY 3.0Climate facts
- Average high
- 18 °C
- Average low
- 8 °C
- Rainy days (est.)
- 14 rainy days (est.)
- Sun (est.)
- 7 h/day
- Humidity
- 73 %
Climate evidence with direct month comparison
The highlighted row is the selected month. Precipitation total and rainy days are separate monthly averages.
| Month | Avg high °C | Avg low °C | Rainy days (est.) | Precipitation mm | Sun h/day (est.) | Humidity % | Wind m/s | Score |
|---|---|---|---|---|---|---|---|---|
| July | 18 | 8 | 15 | 102 | 7.5 | 75 | 0.8 | 59 |
| August (selected) | 18 | 8 | 14 | 94 | 6.5 | 73 | 0.8 | 64 |
| September | 14 | 4 | 13 | 92 | 5.0 | 77 | 0.7 | 50 |
How do the previous and next months compare?
Baseline: August (64/100)
Positive and negative values show the change from the selected month.
| Score Δ | Average high Δ | Average low Δ | Rainy days Δ | Rain Δ | Sun Δ | Humidity Δ | Wind Δ | |
|---|---|---|---|---|---|---|---|---|
| July | -5 | -0.3 °C | ±0 °C | +1.5 | +7.9 mm | +1 h | +1.7 % | ±0 m/s |
| September | -14 | -3.7 °C | -3.7 °C | -0.3 | -2 mm | -1.5 h | +4 % | ±0 m/s |
All twelve months in context
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Where to stay in Chamonix
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Useful next decisions
Frequently asked questions
How warm is Chamonix in August?
The average daily high is around 18 °C, with an average daily low of about 8 °C.
Does it rain a lot in Chamonix in August?
The curated estimate is about 14 rainy days per month, not a directly measured long-term average. Total precipitation averages around 94 mm for the month. A rainy day does not mean all-day rain.
When is the best time to visit Chamonix?
By the climate score, August are the strongest months for Chamonix. August is one of them.