Wengen Weather in September
September in Wengen sees daytime temperatures around 13°C (55°F) and lows of 3°C (37°F) at night. With around 157 mm (6.2 in) of rainfall expected, it's worth packing a rain jacket.
Rainfall in Wengen in September
Climate statistics over the past 30 years suggest around 15 days of rain, with 157 mm (6.2 in) average for the month. Wet weather is a regular and significant part of this month. Frequent days of rain combined with high totals means proper waterproofs are worth packing.
Temperature in Wengen in September
September in Wengen sees highs of 13°C (55°F) and lows of 3°C (37°F) overnight. Even when the weather is stable, mornings and evenings can still feel distinctly cool. Nights drop to 3°C (37°F). Cold nights like these are actually great for sleeping well, as long as you have a warm enough duvet.
Sunshine in Wengen in September
The city usually sees around 149 hours of sunlight, indicating a moderately sunny period.For additional travel inspiration, our weather planner can help you discover destinations worldwide.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Switzerland, check out our Wengen's climate page.
Wengen Temperature in September
Min Temperature
3°C (37°F)
Max Temperature
13°C (55°F)
Chance of Rain
50%
Precipitation
157 mm (6.2 in)
Rainy days
15 days
Humidity
80% *
Sunshine
149 hours *
Percentage Sunshine
52% *
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Wengen typically drop from around 20°C (68°F) at the start of September to approximately 16°C (61°F) by the end. Nights are cold, with lows typically ranging from 5°C (41°F) to 8°C (46°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 for Wengen in September
Browse day-by-day weather records for Wengen spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Wengen historical weather extremes in September
Based on 49 years of weather observations in Wengen between 1976 and 2025, these are the recorded extremes.
- The warmest day in September was on September 14, 1987, with a maximum of 31°C (88°F).
- The lowest daytime temperature in September was 0°C (32°F), recorded on September 19, 1981.
- The lowest overnight temperature recorded in September was -13°C (9°F) (September 29, 1995).
- The heaviest September precipitation occurred on September 13, 2008, when 47 mm (1.9 in) of precipitation fell.
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
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poor
What to Wear in Wengen in September
The weather can be unpredictable in September, so pack clothes you can easily mix and match. You could bring jeans, other long pants, and a few t-shirts. A light jacket or light sweater will be pleasant for the cooler moments. Also bring a poncho, it will rain a lot! Waterproof everything you can. Sunglasses could come in handy during the sunnier parts of your trip.What To Do in Wengen in September
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Switzerland, check out our Wengen's climate page.
Temperature Rainfall Sunshine Humidity
See the full Wengen climate overview or explore weather in Switzerland.
