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September Weather in Brienzwiler, Switzerland

Last updated: August 27, 2025

The average temperature in Brienzwiler, Switzerland during September is a mild 10°C (50°F). However, you might experience a minimum of -2°C (29°F) and a pleasant maximum of 21°C (71°F). With precipitation totaling 156 mm (6.2 in) over about 15 days, don’t forget your umbrella! The average humidity sits at a comfortable 83%, making for a refreshing atmosphere.

September Temperature in Brienzwiler

In September in Brienzwiler, the average temperature is 10°C (50°F). The maximum can reach 21°C (71°F) and the minimum can be as low as -2°C (29°F). Be prepared for a range of temperatures, as this time of year can offer both mild and chilly conditions, perfect for layering your travel wardrobe.

September Weather in Brienzwiler: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Brienzwiler, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Brienzwiler, September typically has an average temperature of 10°C (50°F), with highs reaching up to 21°C (71°F) and lows dropping to around -2°C (29°F).
JanFebMarAprMayJunJulAugSepOctNovDec242832384454575650423326
Data source: Temperature data for Brienzwiler generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

September Precipitation in Brienzwiler

In Brienzwiler in September, the precipitation amount is 156 mm (6.2 in) over a span of 15 days.

September Precipitation Trends in Brienzwiler

The chart displays monthly precipitation patterns in Brienzwiler, with values for each month alongside September’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how September’s conditions compare to those of other months. In Brienzwiler, September typically receives around 156 mm (6.2 inches) of precipitation spread over approximately 15 days.
JanFebMarAprMayJunJulAugSepOctNovDec13610813398192258253248156163104189
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Brienzwiler

In Brienzwiler in September, humidity is 83%. With an average temperature of 10°C (50°F), this humidity feels like a damp chill that clings to your skin, making outdoor exploration less comfortable and prompting visitors to seek cozy indoor activities.

September Average Humidity in Brienzwiler

This chart illustrates the average monthly humidity levels in Brienzwiler, with September’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In September, average humidity in Brienzwiler is approximately 83%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec92%89%87%84%80%82%83%80%83%90%89%90%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Brienzwiler

In Brienzwiler in September, the maximum UV index is 7, which corresponds to the high Exposure Category. This means that the time to burn is approximately 25 minutes. For more detailed information, you can check the Hourly UV Index in Brienzwiler.

Maximum UV Index Levels in Brienzwiler for September

The chart shows the monthly maximum UV Index (UVI) for Brienzwiler in September, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues. In September, the maximum UV index in Brienzwiler typically reaches 7, which falls under the high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec24689101097532
Data source: Brienzwiler September UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

  •  Extreme (11+): Avoid the sun, stay in shade.
  •  Very High (8-10): Limit sun exposure.
  •  High (6-7): Use SPF 30+ and protective clothing.
  •  Moderate (3-5): Midday shade recommended.
  •  Low (0-2): No protection needed.

How September Weather in Brienzwiler Compares to Other Months

Weather in Brienzwiler varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Brienzwiler, focusing on differences in temperature, rainfall, humidity, and UV levels.

This table compares monthly weather conditions in Brienzwiler, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-5°C (24°F)136 mm (5.4 inches)92%low
February Weather-2°C (28°F)108 mm (4.2 inches)89%moderate
March Weather0°C (32°F)133 mm (5.2 inches)87%high
April Weather3°C (38°F)98 mm (3.9 inches)84%very high
May Weather7°C (45°F)192 mm (7.6 inches)80%very high
June Weather12°C (54°F)258 mm (10.2 inches)82%very high
July Weather14°C (57°F)253 mm (10.0 inches)83%very high
August Weather13°C (56°F)248 mm (9.7 inches)80%very high
September Weather10°C (50°F)156 mm (6.2 inches)83%high
October Weather6°C (43°F)163 mm (6.4 inches)90%moderate
November Weather1°C (33°F)104 mm (4.1 inches)88%moderate
December Weather-3°C (27°F)189 mm (7.4 inches)90%low

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