Thonon-les-Bains Weather in September

September in Thonon-les-Bains typically sees daytime highs of 19°C (66°F) and nighttime lows of 10°C (50°F). Rainfall is also possible this month, so it's worth packing an umbrella.

Rainfall in Thonon-les-Bains in September

Historically, September sees about 12 days of rain, with a monthly average of 121 mm (4.8 in). When showers do arrive, they tend to be on the heavier side. Worth being prepared even if rain days are not that numerous.

Temperature in Thonon-les-Bains in September

If you're visiting Thonon-les-Bains in September, expect highs of 19°C (66°F) and overnight lows around 10°C (50°F). Conditions are often most pleasant around the middle of the day. At 10°C (50°F) overnight, it can feel quite a bit cooler after dark. Worth packing something warmer for evenings, but the cooler temperatures are ideal for sleeping.

Sunshine in Thonon-les-Bains in September

The city usually sees around 185 hours of sunlight, indicating a moderately sunny period.

For Thonon-les-Bains itself, June, July and August generally stand out with the best circumstances. If you're seeking pleasant, dry and sunny weather somewhere else in the world, our weather planner can help you explore other options.

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For a detailed overview over the year and the best time to visit France, check out our Thonon-les-Bains's climate page.

Thonon-les-Bains Temperature in September

Min Temperature 10°C (50°F)  

Max Temperature 19°C (66°F)  

Chance of Rain 41%  

Precipitation 121 mm (4.8 in)  

Rainy days 12 days  

Humidity 73% *  

Sunshine 185 hours *  

Percentage Sunshine 52% *  

* Data from: Lausanne, Switzerland (20 KM, 12 Miles).

What to Wear in Thonon-les-Bains in September

For Thonon-les-Bains in September, you'll want flexible clothing. It's wise to pack cotton shirts, comfortable shorts, and a pair of jeans for cooler evenings. A light sweater or jacket is useful for air-conditioned spaces (like buses) or unexpected cool moments. High rain levels are expected, so pack waterproof gear and an umbrella or poncho. It won't hurt to bring your sunglasses along, as you'll see some sunny periods.

What To Do in Thonon-les-Bains in September

We rated the following activities from 1 (least suitable) to 10 (best) to do.

Swimming

6/10

Cycling

9/10

Walking

9/10

Camping

6/10

Outdoor sports

9/10

Select a Month

Check the conditions for any month of the year.

• January
• February
• March
• April

• May
• June
• July
• August

• September
• October
• November
• December

For a detailed overview over the year and the best time to visit France, check out our Thonon-les-Bains's climate page.

More climate data for Thonon-les-Bains

Temperature Rainfall Sunshine Humidity

See the full Thonon-les-Bains climate overview or explore weather in France.