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Zweisimmen Weather in September
September in Zweisimmen brings moderate temperatures, with highs of 16°C (61°F) and nights dropping to 5°C (41°F). Rainfall is on the higher side this month, averaging around 147 mm (5.8 in), so keep a rain jacket handy.
Rainfall in Zweisimmen in September
Looking at the last 30 years, the data shows about 14 days with rain, averaging 147 mm (5.8 in) for the month. Rainfall intensity is on the higher side this month. Expect more substantial showers rather than light, passing rain.
Temperature in Zweisimmen in September
September in Zweisimmen brings moderate temperatures, with highs of 16°C (61°F) and nights around 5°C (41°F). This creates a mild day-to-night pattern that is generally easy to manage with the right clothing. Nights drop to 5°C (41°F). Cold nights like these are actually great for sleeping well, as long as you have a warm enough duvet.
Sunshine in Zweisimmen in September
Enjoy a sunny month with about 210 hours of sunshine, the clear skies make Zweisimmen even more beautiful.If you prefer dry days with pleasant temperatures, August typically offers 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.
Zweisimmen Temperature in September
Min Temperature
5°C (41°F)
Max Temperature
16°C (61°F)
Chance of Rain
48%
Precipitation
147 mm (5.8 in)
Rainy days
14 days
Humidity
71% *
Sunshine
210 hours *
Percentage Sunshine
65% *
* Data from: Sion, Switzerland (37 KM, 23 Miles).
Zweisimmen Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Zweisimmen - and find the best time to visit.
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Zweisimmen typically drop from around 19°C (66°F) at the start of September to approximately 15°C (59°F) by the end. Nights are cold, with lows typically ranging from 6°C (43°F) to 9°C (48°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 Zweisimmen in September
Browse day-by-day weather records for Zweisimmen spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Zweisimmen historical weather extremes in September
According to our 50 years of weather records for Zweisimmen, the following extremes were recorded between 1976 and 2026.
- Zweisimmen recorded its highest September temperature of 32°C (90°F) on September 8, 2026.
- Zweisimmen experienced its chilliest September day on September 25, 2002, reaching only 2°C (36°F).
- The coldest night in September in Zweisimmen was on September 29, 1995, with a minimum of -13°C (9°F).
- The wettest September day on record brought 42 mm (1.7 in) of precipitation to Zweisimmen (September 28, 2022).
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 Zweisimmen 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. Don't forget sun protection, sunglasses, sunscreen, and a hat. These are all good ideas with this much sunshine.
What To Do in Zweisimmen in September
We rated the following activities from 1 (least suitable) to 10 (best) to do.
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Cycling5/10 -
Walking5/10 -
Camping3/10 -
Outdoor sports9/10
Zweisimmen 3-Day Forecast
More climate data for Zweisimmen
Temperature Rainfall Sunshine Humidity
See the full Zweisimmen 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
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The 5 most scenic train journeys in Switzerland
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