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September Weather in Bjoerneborg, Sweden

Last updated: August 27, 2025

In September, the average temperature in Bjoerneborg, Sweden hovers around 13°C (55°F). Expect temperatures to range from a minimum of 4°C (39°F) to a maximum of 21°C (70°F). With 100 mm (3.9 in) of precipitation spread over 15 days, this month sees an average humidity of 86%, creating a humid and occasionally damp atmosphere.

September Temperature in Bjoerneborg

In September in Bjoerneborg, the average temperature is 13°C (55°F). Maximums can reach 21°C (70°F), while minimums can drop as low as 4°C (39°F). It's advisable to pack layers to stay comfortable during your travels.

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

The chart illustrates September temperature patterns in Bjoerneborg, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Bjoerneborg, September typically has an average temperature of 13°C (55°F), with highs reaching up to 21°C (70°F) and lows dropping to around 4°C (39°F).
JanFebMarAprMayJunJulAugSepOctNovDec313034405162646255473933
Data source: Temperature data for Bjoerneborg 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 Bjoerneborg

In Bjoerneborg in September, the precipitation amount is 100 mm (3.9 in) over a span of 15 days.

September Precipitation Trends in Bjoerneborg

The chart displays monthly precipitation patterns in Bjoerneborg, 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 Bjoerneborg, September typically receives around 100 mm (3.9 inches) of precipitation spread over approximately 15 days.
JanFebMarAprMayJunJulAugSepOctNovDec514854326570951151001077579
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Bjoerneborg

In Bjoerneborg 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 Bjoerneborg

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

In Bjoerneborg 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 Bjoerneborg for better planning.

Maximum UV Index Levels in Bjoerneborg for September

The chart shows the monthly maximum UV Index (UVI) for Bjoerneborg 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 Bjoerneborg typically reaches 4, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec123457754211
Data source: Bjoerneborg 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 Bjoerneborg Compares to Other Months

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

This table compares monthly weather conditions in Bjoerneborg, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather0°C (31°F)51 mm (2.0 inches)94%low
February Weather-1°C (30°F)48 mm (1.9 inches)92%low
March Weather1°C (34°F)53 mm (2.1 inches)89%moderate
April Weather5°C (41°F)32 mm (1.3 inches)81%moderate
May Weather10°C (51°F)65 mm (2.6 inches)72%moderate
June Weather16°C (62°F)70 mm (2.7 inches)68%high
July Weather18°C (65°F)95 mm (3.7 inches)70%high
August Weather17°C (62°F)115 mm (4.5 inches)77%moderate
September Weather13°C (55°F)100 mm (3.9 inches)86%moderate
October Weather8°C (47°F)107 mm (4.2 inches)91%low
November Weather4°C (39°F)75 mm (3.0 inches)93%low
December Weather1°C (34°F)79 mm (3.1 inches)94%low

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