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.