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September Weather in Holmsund, Sweden

Last updated: August 27, 2025

In Holmsund, Sweden, the average temperature in September hovers around 11°C (51°F), providing a cool yet pleasant atmosphere. Expect a minimum of 1°C (34°F) and a maximum rise to 19°C (66°F). With 85 mm (3.4 in) of precipitation spread over 12 days, it's wise to bring an umbrella, as the average humidity is a high 88%. Enjoy the unique climate as you explore!

September Temperature in Holmsund

In September in Holmsund, the average temperature is 11°C (51°F). Maximums can reach 19°C (66°F), while minimums can drop as low as 1°C (34°F). Be sure to pack layers to stay comfortable while exploring the diverse weather conditions!

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

The chart illustrates September temperature patterns in Holmsund, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Holmsund, September typically has an average temperature of 11°C (51°F), with highs reaching up to 19°C (66°F) and lows dropping to around 1°C (34°F).
JanFebMarAprMayJunJulAugSepOctNovDec252329354455615951423429
Data source: Temperature data for Holmsund 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 Holmsund

In Holmsund in September, the precipitation amount is 85 mm (3.4 in) over the course of 12 days.

September Precipitation Trends in Holmsund

The chart displays monthly precipitation patterns in Holmsund, 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 Holmsund, September typically receives around 85 mm (3.4 inches) of precipitation spread over approximately 12 days.
JanFebMarAprMayJunJulAugSepOctNovDec5554472846556377851147991
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Holmsund

In Holmsund in September humidity is 88%. With an average temperature of 11°C (51°F), this humidity feels like traveling through a damp, heavy blanket, making every step slightly more laborious and the air thick with moisture, which can be quite uncomfortable for exploration.

September Average Humidity in Holmsund

This chart illustrates the average monthly humidity levels in Holmsund, 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 Holmsund is approximately 88%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec95%93%91%85%77%75%80%82%88%92%92%93%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Holmsund

In Holmsund in September, the maximum UV index is 3, which corresponds to a moderate Exposure Category. The time to burn is approximately 30 minutes. For more details on the hourly UV index in Holmsund, you can check the information here.

Maximum UV Index Levels in Holmsund for September

The chart shows the monthly maximum UV Index (UVI) for Holmsund 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 Holmsund typically reaches 3, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec112356653211
Data source: Holmsund 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 Holmsund Compares to Other Months

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

This table compares monthly weather conditions in Holmsund, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-4°C (25°F)55 mm (2.2 inches)95%low
February Weather-5°C (24°F)53 mm (2.1 inches)93%low
March Weather-2°C (29°F)47 mm (1.8 inches)91%low
April Weather2°C (35°F)28 mm (1.1 inches)85%moderate
May Weather7°C (44°F)46 mm (1.8 inches)77%moderate
June Weather13°C (56°F)55 mm (2.2 inches)74%high
July Weather16°C (61°F)63 mm (2.5 inches)80%high
August Weather15°C (59°F)77 mm (3.0 inches)82%moderate
September Weather11°C (51°F)85 mm (3.4 inches)88%moderate
October Weather5°C (42°F)114 mm (4.5 inches)92%low
November Weather1°C (34°F)79 mm (3.1 inches)92%low
December Weather-2°C (29°F)91 mm (3.6 inches)93%low

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