The 5 most scenic train journeys in Switzerland
Explore Switzerland's top 5 train journeys, featuring breathtaking Alpine views and engineering marvels like the Glacier Express and Bernina Express.
Geneva Weather in September
September in Geneva brings pleasant temperatures, with highs of 20°C (68°F) and nights dropping to 10°C (50°F). Rainfall is on the higher side this month, averaging around 123 mm (4.8 in), so keep a rain jacket handy.
Rainfall in Geneva in September
Looking at the last 30 years, the data shows about 12 days with rain, averaging 123 mm (4.8 in) for the month. Rainfall intensity is on the higher side this month. Expect more substantial showers rather than light, passing rain.
Temperature in Geneva in September
Geneva in September gets highs of 20°C (68°F) during the day and drops to 10°C (50°F) at night. This creates a mild day-to-night pattern that is generally easy to manage with the right clothing. With overnight lows of 10°C (50°F), nights are cold. The cold air does make for deep, comfortable sleep if you have enough blankets.
Sunshine in Geneva 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 inclined towards comfortable temperatures and drier conditions, September is a good time to visit Geneva.
Geneva Temperature in September
Min Temperature
10°C (50°F)
Max Temperature
20°C (68°F)
Water Temperature
20°C (68°F)
Chance of Rain
40%
Precipitation
123 mm (4.8 in)
Rainy days
12 days
Humidity
74%
Sunshine
183 hours
Percentage Sunshine
55%
Geneva Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Geneva - and find the best time to visit.
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Geneva typically drop from around 23°C (73°F) at the start of September to approximately 18°C (64°F) by the end. Nights are cool, with lows typically ranging from 8°C (46°F) to 12°C (54°F).
Average temperatures in September
Daily Historical Precipitation
50-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in September
Historical weather records for Geneva in September
Browse day-by-day weather records for Geneva spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Geneva historical weather extremes in September
According to our 50 years of weather records for Geneva, the following extremes were recorded between 1976 and 2026.
- Geneva recorded its highest September temperature of 32°C (90°F) on September 8, 2026.
- On September 17, 1988, Geneva saw its coldest September day with temperatures maxing out at 7°C (45°F).
- The coldest night in September in Geneva was on September 18, 1994, with a minimum of -2°C (28°F).
- The wettest day in September Geneva was on September 20, 2000 with 63 mm (2.5 in) of precipitation.
Best Places in Switzerland in September
Find out more about the weather in Switzerland and which places have the best travel conditions in this month. See all of Switzerland in September →
perfect weather
pleasant
tolerable
unpleasant
poor
Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C (68°F) and 29°C (84°F) and not too much precipitation (less than 90 mm (3.5 in) a month).
What to Wear in Geneva in September
Pleasant temperatures in September mean you can pack light but flexibel pieces. Think cotton t-shirts, comfortable walking shorts, and one warmer layer for evenings. A light sweater or denim jacket works well. Prepare for significant rainfall with proper waterproof clothing and shoes. 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. Bring sunglasses since you'll have some sunny periods throughout the month
What To Do in Geneva in September
We rated the following activities from 1 (least suitable) to 10 (best) to do.
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Swimming6/10 -
Cycling9/10 -
Walking9/10 -
Camping3/10 -
Outdoor sports9/10
Geneva 3-Day Forecast
More climate data for Geneva
Temperature Rainfall Sunshine Humidity Water Temp
See the full Geneva climate overview or explore weather in Switzerland.
Popular in September
Where to go in September - average daytime high across popular destinations.
Zürich
20°C (68°F) Crans-Montana15°C (59°F) Engelberg
15°C (59°F) Nendaz15°C (59°F) Saas-Fee12°C (54°F) Davos13°C (55°F) Grindelwald13°C (55°F) Zermatt11°C (52°F) Bucket list
Need travel inspiration? Check out our bucket list articles and be inspired.
The 5 most scenic train journeys in Switzerland
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