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September Weather in Steffisburg, Switzerland

Last updated: August 27, 2025

In September, the average temperature in Steffisburg, Switzerland hovers around 11°C (53°F), with a potential minimum of 0°C (32°F) and a maximum reaching up to 23°C (73°F). It's a month that brings approximately 124 mm (4.9 in) of precipitation over 14 days, contributing to an average humidity of 83%. Be prepared for a mix of chilly and mild days, along with occasional rain!

September Temperature in Steffisburg

In September in Steffisburg, the average temperature is 11°C (53°F), with maximums reaching 23°C (73°F) and minimums dropping as low as 0°C (32°F). This makes Steffisburg a great destination for travelers who enjoy mild weather with the possibility of warmer days.

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

The chart illustrates September temperature patterns in Steffisburg, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Steffisburg, September typically has an average temperature of 11°C (53°F), with highs reaching up to 23°C (73°F) and lows dropping to around 0°C (32°F).
JanFebMarAprMayJunJulAugSepOctNovDec263035414857605953453529
Data source: Temperature data for Steffisburg 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 Steffisburg

In Steffisburg in September, the precipitation amount is 124 mm (4.9 in) over a span of 14 days.

September Precipitation Trends in Steffisburg

The chart displays monthly precipitation patterns in Steffisburg, 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 Steffisburg, September typically receives around 124 mm (4.9 inches) of precipitation spread over approximately 14 days.
JanFebMarAprMayJunJulAugSepOctNovDec1231031259418222521920312413897175
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Steffisburg

In Steffisburg in September, humidity is 83%. With an average temperature of 11°C (53°F), this humidity feels like a heavy blanket wrapping around you, making every step feel sluggish and causing an inevitable sheen of sweat to form, which can dampen the joy of exploring your surroundings.

September Average Humidity in Steffisburg

This chart illustrates the average monthly humidity levels in Steffisburg, 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 Steffisburg 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 Steffisburg

In Steffisburg 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 Steffisburg.

Maximum UV Index Levels in Steffisburg for September

The chart shows the monthly maximum UV Index (UVI) for Steffisburg 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 Steffisburg typically reaches 7, which falls under the high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec24679101097532
Data source: Steffisburg 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 Steffisburg Compares to Other Months

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

This table compares monthly weather conditions in Steffisburg, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-3°C (26°F)123 mm (4.9 inches)92%low
February Weather-1°C (31°F)103 mm (4.0 inches)89%moderate
March Weather2°C (36°F)125 mm (4.9 inches)87%high
April Weather5°C (42°F)94 mm (3.7 inches)84%high
May Weather9°C (48°F)182 mm (7.2 inches)80%very high
June Weather14°C (57°F)225 mm (8.9 inches)82%very high
July Weather15°C (60°F)219 mm (8.6 inches)83%very high
August Weather15°C (59°F)203 mm (8.0 inches)80%very high
September Weather11°C (53°F)124 mm (4.9 inches)83%high
October Weather7°C (45°F)138 mm (5.4 inches)90%moderate
November Weather2°C (35°F)97 mm (3.8 inches)88%moderate
December Weather-2°C (29°F)175 mm (6.9 inches)90%low

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