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September Weather in Sommen, Sweden

Last updated: August 27, 2025

In Sommen, Sweden, the average temperature in September hovers around 13°C (55°F), with a minimum of -1°C (31°F) and a maximum reaching up to 25°C (77°F). This month sees around 77 mm (3.0 in) of precipitation spread over approximately 12 days, contributing to a notably high average humidity of 86%.

September Temperature in Sommen

In September in Sommen, the average temperature is 13°C (55°F). The maximum can reach 25°C (77°F), and the minimum can be as low as -1°C (31°F). This varied climate makes Sommen a versatile destination for travelers looking to experience both mild and cool weather.

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

The chart illustrates September temperature patterns in Sommen, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Sommen, September typically has an average temperature of 13°C (55°F), with highs reaching up to 25°C (77°F) and lows dropping to around -1°C (31°F).
JanFebMarAprMayJunJulAugSepOctNovDec323135425162646255474034
Data source: Temperature data for Sommen 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 Sommen

In Sommen in September, the precipitation amount is 77 mm (3.0 in) spread over 12 days.

September Precipitation Trends in Sommen

The chart displays monthly precipitation patterns in Sommen, 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 Sommen, September typically receives around 77 mm (3.0 inches) of precipitation spread over approximately 12 days.
JanFebMarAprMayJunJulAugSepOctNovDec353945335757688477754849
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Sommen

In Sommen in September humidity is 86%. With an average temperature of 13°C (55°F), this humidity feels like a damp blanket clinging to your skin, making travel quite uncomfortable and urging you to seek cooler, dryer spots.

September Average Humidity in Sommen

This chart illustrates the average monthly humidity levels in Sommen, 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 Sommen is approximately 86%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec94%92%89%81%72%68%70%77%86%91%93%94%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Sommen

In Sommen in September, the maximum UV index reaches 4, which corresponds to a moderate Exposure Category. With a time to burn of 30 minutes, it’s important to take precautions to protect your skin. You can find more details in the Hourly UV Index in Sommen for better planning.

Maximum UV Index Levels in Sommen for September

The chart shows the monthly maximum UV Index (UVI) for Sommen 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 Sommen typically reaches 4, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec123457764211
Data source: Sommen 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 Sommen Compares to Other Months

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

This table compares monthly weather conditions in Sommen, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather0°C (33°F)35 mm (1.4 inches)94%low
February Weather0°C (31°F)38 mm (1.5 inches)92%low
March Weather2°C (35°F)45 mm (1.8 inches)89%moderate
April Weather5°C (42°F)33 mm (1.3 inches)81%moderate
May Weather11°C (52°F)57 mm (2.2 inches)72%moderate
June Weather17°C (62°F)57 mm (2.3 inches)68%high
July Weather18°C (64°F)68 mm (2.7 inches)70%high
August Weather16°C (62°F)84 mm (3.3 inches)77%high
September Weather13°C (55°F)77 mm (3.0 inches)86%moderate
October Weather8°C (47°F)75 mm (3.0 inches)91%low
November Weather4°C (40°F)48 mm (1.9 inches)93%low
December Weather1°C (34°F)49 mm (1.9 inches)94%low

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