September · Switzerland
Best time to visit Geneva in September Weather, crowds & prices
Weather in Geneva in September
Average temperature 16°C, 145 mm of rain, about 13 days with 6+ hours of sunshine and 71% humidity — based on the five most recent complete years of ERA5 data (2021–2025).
September score
6.8/10
Ranked #5 of 12 months
- Avg temp
- 16°C
- Rainfall
- 145 mm
- Humidity
- 71%
- Days with 6h+ sun
- 13
- Crowd Density
- Moderate Crowds
- Average Expenses
- $$ · Moderate Cost ($$)
September in Geneva scores 6.8/10 for sightseeing and cultural travel - an above-average month (#5 of 12). Expect around 16°C, 145 mm of rain, and roughly 13 days with 6+ hours of sunshine this month.
Geneva's Jet d'Eau and Lake Léman glow May–Sep when warm, dry days frame crisp Mont Blanc views.
September in Geneva — middling scores, decent value
September averages 16°C (60°F), the range most people find easiest for walking a city all day without either overheating or losing daylight to weather.
At 145 mm this is a genuinely wet month: about 13 days with 6+ hours of sunshine in total, and outdoor plans need an indoor fallback.
It scores 6.8/10 here, 5th of 12 months, against 9.3/10 in the destination's best month.
Pack layers you can shed by midday plus one warm layer for the evening, a proper rain shell rather than an umbrella.
Plan for mid-season pricing, with crowds are moderate.
Flexible dates? July scores 2.5 points higher here — enough to change the trip.
Frequently asked
- What is the weather like in Geneva in September?
- In September, Geneva averages 16°C, 145 mm of rain, and about 13 days with 6+ hours of sunshine. Its climate-comfort score is 6.8/10.
- Is September a good time to visit Geneva?
- September earns a 6.8/10 climate-comfort score. Use the year-round chart to weigh the weather against your budget and crowd preferences.
- How much does it rain in Geneva in September?
- Expect about 145 mm of rain in September. Average humidity is 71% and there are about 13 days with 6+ hours of sunshine.
Curated in Geneva
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Geneva, Switzerland. Live activities and tours from GetYourGuide, matched to this destination.