easeweather.com
Chamonix-Mont-Blanc
AgdeAix-en-ProvenceAjaccioAngersAnnecyArlesAvignonBayeuxBeaulieu-sur-DordogneBeauneBerck-PlageBergeracBiarritzBordeauxBrestCaenCannesCarcassonneCergy-Pontoise
Chamonix-Mont-Blanc
Cherbourg-OctevilleChessyClermont-FerrandColmarCologneCorsica IslandDijonDinanDisneyland ParisGrenobleLa FlècheLa RochelleLa Salette-FallavauxLe HavreLe LudeLe MansLilleLoiréLourdesLouvilliers-en-DrouaisLyonMainzacMalakoffMarseilleMetzMont Saint-MichelMontpellierNantesNiceNormandieNîmesParisPerpignanPoitiersPont-l'ÉvêqueQuimperReimsRennesReuxRouenRoyanSaint-MaloSaint-TropezSaint-ÉtienneSarlat-la-CanédaStrasbourgSurgèresTignesToulonToulouseTournon-sur-RhôneTroyesVainsVal ThorensVernonVersaillesViviers More Locations
France weather

Weather in Chamonix-Mont-Blanc for September 2026

Your guide to Chamonix-Mont-Blanc weather in September - trends and predictions

    Temperatures

  • In general, the average temperature in Chamonix-Mont-Blanc at the beginning of September is 17 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 10.3 °C by the end of September.

    • Rain 🌧️

  • Chamonix-Mont-Blanc in September brings notable rainfall, with an average of 17 rainy days and a total precipitation of 488.4 mm.

    • More

  • Is September a good time to visit Chamonix-Mont-Blanc? check out the best time to travel to Chamonix-Mont-Blanc page.

  • New! Chat with our AI weatherman - it’s amazing and free.

Average dry days
13
Dry days
Average rainy days
17
Rainy days
Average snowy days
0
Snow days
Average temperatures
17°/2°
Temperatures
Average wind speed
9 km/h
Avg max wind
Average humidity
77 %
Avg humidity

Chamonix-Mont-Blanc Weather September

Move between months or click on a day
August
October
Mon.Tue.Wed.Thu.Fri.Sat.Sun.
1
Sunny
15°
2
Sunny
15°
3
Sunny
18°
4
Patchy light rain with thunder
17°
5
Patchy light rain with thunder
15°
6
Sunny
19°
7
Sunny
20°
8
Patchy rain possible
17°
9
Patchy rain possible
13°
10
Patchy rain possible
15°
11
Sunny
14°
12
Thundery outbreaks possible
11°
13
Fog
8°
14
Thundery outbreaks possible
11°
15
Partly cloudy
14°
16
Light rain shower
12°
17
Thundery outbreaks possible
15°
18
Moderate rain
15°
19
Patchy rain possible
15°
20
Patchy light rain with thunder
15°
21
Patchy rain possible
14°
22
Light rain shower
10°
23
Light rain
6°
24
Sunny
8°
25
Sunny
10°
26
Sunny
10°
27
Sunny
11°
28
Sunny
9°
29
Partly cloudy
12°
30
Mist
12°

Temperatures trend during September in Chamonix-Mont-Blanc

See the weather trend as well as the moving average line

September weather in Chamonix-Mont-Blanc day by day

Click on a date for more information
August October
Date Weather Temperatures Rain Snow More
1 Sept. Sunny
Sunny
 15° /6° 16.4 mm 0 cm
2 Sept. Sunny
Sunny
 15° /6° 5.7 mm 0 cm
3 Sept. Sunny
Sunny
 18° /7° 3.2 mm 0 cm
4 Sept. Patchy light rain with thunder
Patchy light rain with thunder
 17° /8° 14.7 mm 0 cm
5 Sept. Patchy light rain with thunder
Patchy light rain with thunder
 15° /7° 4.8 mm 0 cm
6 Sept. Sunny
Sunny
 19° /6° 0 mm 0 cm
7 Sept. Sunny
Sunny
 20° /8° 0.9 mm 0 cm
8 Sept. Patchy rain possible
Patchy rain possible
 17° /8° 6.5 mm 0 cm
9 Sept. Patchy rain possible
Patchy rain possible
 13° /7° 8.3 mm 0 cm
10 Sept. Patchy rain possible
Patchy rain possible
 15° /6° 2.4 mm 0 cm
11 Sept. Sunny
Sunny
 14° /6° 3.1 mm 0 cm
12 Sept. Thundery outbreaks possible
Thundery outbreaks possible
 11° /3° 2.9 mm 0 cm
13 Sept. Fog
Fog
 8° /3° 5.6 mm 1.4 cm
14 Sept. Thundery outbreaks possible
Thundery outbreaks possible
 11° /3° 3.4 mm 0 cm
15 Sept. Partly cloudy
Partly cloudy
 14° /4° 1.1 mm 0 cm
16 Sept. Light rain shower
Light rain shower
 12° /4° 0.8 mm 0 cm
17 Sept. Thundery outbreaks possible
Thundery outbreaks possible
 15° /4° 0.4 mm 0 cm
18 Sept. Moderate rain
Moderate rain
 15° /5° 6.1 mm 0 cm
19 Sept. Patchy rain possible
Patchy rain possible
 15° /5° 2.8 mm 0 cm
20 Sept. Patchy light rain with thunder
Patchy light rain with thunder
 15° /6° 2.7 mm 0 cm
21 Sept. Patchy rain possible
Patchy rain possible
 14° /5° 7 mm 0 cm
22 Sept. Light rain shower
Light rain shower
 10° /3° 13.7 mm 0 cm
23 Sept. Light rain
Light rain
 6° /0° 14.1 mm 0 cm
24 Sept. Sunny
Sunny
 8° /0° 4.2 mm 0 cm
25 Sept. Sunny
Sunny
 10° /1° 1.3 mm 0 cm
26 Sept. Sunny
Sunny
 10° /3° 22.6 mm 0 cm
27 Sept. Sunny
Sunny
 11° /2° 2.9 mm 0 cm
28 Sept. Sunny
Sunny
 9° /1° 2 mm 0 cm
29 Sept. Partly cloudy
Partly cloudy
 12° /2° 0.1 mm 0 cm
30 Sept. Mist
Mist
 12° /3° 3.1 mm 0 cm
Next
Important Notice
Our weather forecast for Chamonix-Mont-Blanc in September is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the Chamonix-Mont-Blanc forecast closer to your planned date for the most up-to-date weather information.
Change Month
‹
›

Chamonix-Mont-Blanc weather in September vs August vs October

Compare September weather in Chamonix-Mont-Blanc with the previous and following months. See how temperature, rainfall, wind, and other conditions change throughout the year to help you plan your visit.
AugustSeptemberOctober
WeatherPatchy rain possible
Patchy rain possible
Sunny
Sunny
Patchy rain possible
Patchy rain possible
Temperatures20°/7°17°/2°13°/1°
Rainfall289 mm488 mm303 mm
Snowfall0 cm4 cm2 cm
Wind9.3 km/h8.9 km/h9.9 km/h
Humidity69%77%77%
Rainy days13 days17 days5 days
Snow days0 days0 days0 days
Dry days18 days13 days26 days

Planning a trip to Chamonix-Mont-Blanc? Discover the best time to visit

Chamonix-Mont-Blanc in September - FAQ

What are the expected maximum and minimum temperatures in Chamonix-Mont-Blanc during September?
During September, expect a variety of temperatures with highs around 17° and lows near 2°, suitable for diverse activities and preferences.
How much rainfall should be expected in Chamonix-Mont-Blanc during September?
Significant rainfall exceeding 488.4 mm is expected in Chamonix-Mont-Blanc during September, occurring over more than 17 days. Preparing for wet conditions is recommended in your planning.
Will it snow in Chamonix-Mont-Blanc in September 2026?
Chamonix-Mont-Blanc typically sees 4.1 cm of snowfall during September.
What are the typical wind conditions in Chamonix-Mont-Blanc during September?
The average wind speed in Chamonix-Mont-Blanc during September is 9 km/h, suggesting breezy to windy conditions, depending on your activities.

What to pack to Chamonix-Mont-Blanc in September?

As you prepare for your trip to Chamonix-Mont-Blanc in September, it's important to consider the typical weather patterns for the time of year. Below is a carefully tailored packing list to ensure that your time in Chamonix-Mont-Blanc, during September, is comfortable and enjoyable, regardless of the weather conditions.

  • Clothing
    • Warm Clothing: Sweaters, hoodies, long pants
    • Rain Gear: Lightweight, waterproof clothing
  • Footwear
    • Waterproof Shoes
  • Accessories
    • Scarves: To protect you from the cold wind
    • Gloves/Mittens: Essential for cold weather
    • Warm Hats: Warm hats for insulation in cold weather
    • Umbrellas/Raincoats: For rainy days

Chamonix-Mont-Blanc snow forecast September 2026

Track daily snowfall levels and discover Chamonix-Mont-Blanc’s snowy potential this September ❄️

September rainfall patterns in Chamonix-Mont-Blanc

Explore the daily rainfall trends and prepare for Chamonix-Mont-Blancs September weather 💧

Quick links

More Chamonix-Mont-Blanc weather pages
You are here
Location coordinates Where is Chamonix-Mont-Blanc?

Get accurate weather forecasts for Chamonix-Mont-Blanc, located at latitude 45.924 and longitude 6.869. Stay updated with localized weather information tailored for Chamonix-Mont-Blanc.

Found a mistake?
We appreciate your attention to details. Tell us here.