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September Weather in Katrineholm, Sweden

Last updated: August 27, 2025

In September, the average temperature in Katrineholm, Sweden hovers around 13°C (55°F), with lows dipping to 0°C (33°F) and highs reaching up to 25°C (77°F). Expect some rain, as 63 mm (2.5 in) of precipitation typically falls over 11 days, accompanied by a relatively high average humidity of 83%.

September Temperature in Katrineholm

In September in Katrineholm, the average temperature is 13°C (55°F), with maximums reaching 25°C (77°F) and minimums dropping as low as 0°C (33°F). It's a great time to pack layers for your travels, as the weather can vary significantly throughout the day.

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

The chart illustrates September temperature patterns in Katrineholm, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Katrineholm, 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 0°C (33°F).
JanFebMarAprMayJunJulAugSepOctNovDec313135425262646255463933
Data source: Temperature data for Katrineholm 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 Katrineholm

In Katrineholm in September, the precipitation amount is 63 mm (2.5 in) during a total of 11 days.

September Precipitation Trends in Katrineholm

The chart displays monthly precipitation patterns in Katrineholm, 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 Katrineholm, September typically receives around 63 mm (2.5 inches) of precipitation spread over approximately 11 days.
JanFebMarAprMayJunJulAugSepOctNovDec373142305950637263714855
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Katrineholm

In Katrineholm in September humidity is 83%. With an average temperature of 13°C (55°F), this humidity feels like a damp embrace, often leaving travelers feeling slightly sticky and in need of frequent breaks in the shade.

September Average Humidity in Katrineholm

This chart illustrates the average monthly humidity levels in Katrineholm, 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 Katrineholm is approximately 83%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec91%89%88%82%71%69%67%73%83%89%91%90%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Katrineholm

In Katrineholm 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 Katrineholm for better planning.

Maximum UV Index Levels in Katrineholm for September

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

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

This table compares monthly weather conditions in Katrineholm, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather0°C (32°F)37 mm (1.4 inches)91%low
February Weather-1°C (31°F)31 mm (1.2 inches)89%low
March Weather2°C (36°F)42 mm (1.7 inches)88%moderate
April Weather6°C (42°F)30 mm (1.2 inches)82%moderate
May Weather11°C (52°F)59 mm (2.3 inches)71%moderate
June Weather17°C (63°F)50 mm (2.0 inches)69%high
July Weather18°C (65°F)63 mm (2.5 inches)67%high
August Weather17°C (62°F)71 mm (2.8 inches)72%high
September Weather13°C (55°F)63 mm (2.5 inches)83%moderate
October Weather8°C (47°F)71 mm (2.8 inches)89%low
November Weather4°C (39°F)48 mm (1.9 inches)91%low
December Weather1°C (33°F)55 mm (2.2 inches)90%low

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