30YearWeather
Chamonix in September
Chamonix weather in September - France
🌤️Mild & Comfortable

Chamonix Weather in September

Plan your September trip to Chamonix, France. Based on 30 years of NASA data, expect temperatures of 18°C (high) to 9°C (low), with 37% rain probability and 8 hours of daily sunshine. Pack rain gear for around 30 rainy days.

Avg High
18°C

Hottest around day 5

Avg Low
9°C

Coolest around day 28

Rainy Days
30days

37% avg rain chance

Sunshine
8hrs/day

Autumn season

Chamonix September Weather Calendar

Click any day to see detailed weather information

Day 1
cloudy
Cloudy
20°C35%
Day 2
cloudy
Cloudy
20°C35%
Day 3
cloudy
Cloudy
20°C39%
Day 4
cloudy
Cloudy
20°C35%
Day 5
cloudy
Cloudy
20°C36%
Day 6
cloudy
Cloudy
20°C36%
Day 7
cloudy
Cloudy
20°C37%
Day 8
cloudy
Cloudy
20°C33%
Day 9
cloudy
Cloudy
20°C35%
Day 10
cloudy
Cloudy
19°C38%
Day 11
cloudy
Cloudy
19°C39%
Day 12
rain
Rainy
19°C41%
Day 13
rain
Rainy
19°C42%
Day 14
rain
Rainy
18°C44%
Day 15
rain
Rainy
18°C41%
Day 16
cloudy
Cloudy
18°C39%
Day 17
cloudy
Cloudy
18°C35%
Day 18
cloudy
Cloudy
18°C32%
Day 19
cloudy
Cloudy
18°C30%
Day 20
cloudy
Cloudy
18°C30%
Day 21
cloudy
Cloudy
18°C34%
Day 22
cloudy
Cloudy
17°C36%
Day 23
rain
Rainy
17°C43%
Day 24
rain
Rainy
16°C43%
Day 25
rain
Rainy
16°C44%
Day 26
cloudy
Cloudy
16°C40%
Day 27
cloudy
Cloudy
16°C39%
Day 28
cloudy
Cloudy
16°C35%
Day 29
cloudy
Cloudy
16°C34%
Day 30
cloudy
Cloudy
16°C33%

Essential Travel Info for Chamonix

🗓️ Best Time to Visit📖 Travel Guide🍴 Food Guide

Currency

EUR

€ Euro

Language

French

Driving

Right side

Safety

High Safety

GPI: 1.895

Travel Intelligence

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Health & Safety Advisory

CDC travel health recommendations

7 Recommendations
COVID-19

All eligible travelers should be up to date with their COVID-19 vaccines. Please seeYour COVID-19 Vaccinationfor more information.

Hepatitis A

Consider hepatitis A vaccination for most travelers. It is recommended for travelers who will be doing higher risk activities, such as visiting smaller cities, villages, or rural areas where a traveler might get infected through food or water. It is recommended for travelers who plan on eating street food.

Hepatitis B

Recommended for unvaccinated travelers younger than 60 years old traveling to France. Unvaccinated travelers 60 years and older may get vaccinated before traveling to France.

Measles

Cases of measles are on the rise worldwide. Travelers are at risk of measles if they have not been fully vaccinated at least two weeks prior to departure, or have not had measles in the past, and travel internationally to areas where measles is spreading.All international travelers should be fully vaccinated against measles with the measles-mumps-rubella (MMR) vaccine, including an early dose for infants 6–11 months, according toCDC’s measles vaccination recommendations for international travel.

Rabies

Dogs infected with rabies are not commonly found in France.If rabies exposures occur while in France, rabies vaccines are typically available throughout most of the country.Rabies pre-exposure vaccination considerations include whether travelers 1) will be performing occupational or recreational activities that increase risk for exposure to potentially rabid animals and 2) might have difficulty getting prompt access to safe post-exposure prophylaxis.Please consult with a healthcare provider to determine whether you should receive pre-exposure vaccination before travel.For more information, seecountry rabies status assessments.

Tick-borne Encephalitis

Avoid bug bitesLearn more abouttick-borne encephalitis at your destination.

+1 more

Source: CDC Travelers' Health

View Complete Health Guide

Is September a Good Time to Visit Chamonix?

👍Solid choice for most travelers
Short Answer

Perfect travel weather awaits in Chamonix during September - 18°C highs, 79% humidity, and 37% rain probability make this an optimal time for outdoor activities.

Decision Factors

Vaccinations required

Yellow Fever

Health precautions needed

Be aware of: Leptospirosis, Leishmaniasis, Zika

Plenty of sunshine

9h of sunshine daily

Shoulder season - balanced conditions

50% of peak - good value with moderate crowds

Exceptional dining scene

31 Michelin-listed restaurants

Good For

  • 🏛️
    Cultural tourists

    Comfortable conditions for exploring museums and sites

  • 💼
    Business travelers

    Climate-controlled meetings unaffected by weather

Who Should Avoid

  • 👴
    Elderly travelers

    79% humidity creates difficult conditions

Related Guides

Best Time to VisitWhen to AvoidChamonix Overview
900 observations30-year historical data
Confidence: 90%

"According to 30YearWeather's analysis of 30 years of NASA POWER satellite data,Chamonix in September averages 18°C with 37% precipitation probability."

📊 Source: 30YearWeather.com🛰️ Data: NASA POWER (1991-2021)View Methodology →

Frequently Asked Questions: Chamonix in September

What are the temperatures in Chamonix in September?

Daytime highs average 18°C, nights drop to 9°C. Temperatures remain fairly consistent.

How many rainy days in Chamonix in September?

Expect around 30 days with measurable rainfall. An umbrella is advisable.

What to wear in Chamonix in September?

Layers are key. A medium-weight jacket and closed-toe shoes.

Is September peak season in Chamonix?

This is shoulder season—moderate prices and manageable crowds.