Nyon Weather in September

September in Nyon brings pleasant temperatures, with daytime highs of 20°C (68°F) and nights around 11°C (52°F). Quite a bit of rainfall is expected, around 124 mm (4.9 in), so pack an umbrella.

Rainfall in Nyon in September

Based on our climate data of the past 30 years, about 12 days of rain are anticipated, with 124 mm (4.9 in) on average. 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 Nyon in September

September in Nyon brings pleasant temperatures, with highs of 20°C (68°F) and nights around 11°C (52°F). Temperatures can feel cooler in the morning and evening, so layering is often the best approach. With lows of 11°C (52°F), nights are cool. If you're out after dark, an extra layer will keep you comfortable. The cooler air at night is also great for getting a good rest.

Sunshine in Nyon in September

With about 183 hours of sunshine, the area enjoys a nice balance of sun and overcast, creating a pleasant environment.

Average water temperature in September

At 20°C (68°F), the water is pleasant for swimming. Most people find this range ideal, cool enough to be refreshing, warm enough to stay in comfortably.

If you're a fan of comfortable temperatures and drier conditions, September is a great time to visit.