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.