La Roche-sur-Foron Weather in September

September in La Roche-sur-Foron sees daytime temperatures around 19°C (66°F) and lows of 8°C (46°F) at night. With around 124 mm (4.9 in) of rainfall expected, it's worth packing a rain jacket.

Rainfall in La Roche-sur-Foron in September

Typically around 13 days of rainfall are expected, averaging 124 mm (4.9 in) for the month. The rain this month tends to fall in heavier spells rather than light drizzle. When it rains, showers can be significant.

Temperature in La Roche-sur-Foron in September

Daytime highs in La Roche-sur-Foron in September reach 19°C (66°F), with nights around 8°C (46°F). Temperatures can feel cooler in the morning and evening, so layering is often the best approach. At 8°C (46°F) overnight, it gets properly cold after dark. On the bright side, cold nights tend to make for excellent sleeping conditions.

Sunshine in La Roche-sur-Foron in September

The area experiences a moderate amount of sunshine, with approximately 183 hours of sunlight expected. This means a decent mix of sun and overcast.

Average water temperature in September

The water is 20°C (68°F) this month — a comfortable temperature that most swimmers enjoy. Warm enough to stay in without getting cold quickly.

For La Roche-sur-Foron 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 La Roche-sur-Foron's climate page.

La Roche-sur-Foron Temperature in September

Min Temperature 8°C (46°F)  

Max Temperature 19°C (66°F)  

Water Temperature 20°C (68°F) *  

Chance of Rain 42%  

Precipitation 124 mm (4.9 in)  

Rainy days 13 days  

Humidity 74% *  

Sunshine 183 hours *  

Percentage Sunshine 55% *  

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

What to Wear in La Roche-sur-Foron in September

Comfortable temperatures call for an easy wardrobe in September. Pack summer basics like t-shirts and shorts, but include a light jacket for cooler moments. A pair of comfortable walking shoes is essential. Expect heavy rainfall, so bring good rain protection and waterproof bags. Expect water temperatures of around 20°C (68°F), which is ideal for taking a refreshing dip. Bring swimwear and consider packing a towel for drying off. It won't hurt to bring your sunglasses along, as you'll see some sunny periods.

What To Do in La Roche-sur-Foron 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

3/10

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 La Roche-sur-Foron's climate page.

More climate data for La Roche-sur-Foron

Temperature Rainfall Sunshine Humidity Water Temp

See the full La Roche-sur-Foron climate overview or explore weather in France.