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September Weather in Alstermo, Sweden

Last updated: August 27, 2025

In September, the average temperature in Alstermo, Sweden is a comfortable 13°C (55°F), with minimums dipping to 0°C (32°F) and maximums reaching a pleasant 25°C (77°F). Expect precipitation of about 65 mm (2.6 in) across 10 days, contributing to an average humidity level of 81%.

September Temperature in Alstermo

In September in Alstermo, the average temperature is 13°C (55°F). Maximums can reach 25°C (77°F) and minimums can be as low as 0°C (32°F). Be prepared for a range of temperatures and pack accordingly to enjoy your travels comfortably.

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

The chart illustrates September temperature patterns in Alstermo, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Alstermo, 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 (32°F).
JanFebMarAprMayJunJulAugSepOctNovDec333236435262636255474134
Data source: Temperature data for Alstermo 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 Alstermo

In Alstermo in September, the precipitation amount is 65 mm (2.6 in) over a span of 10 days.

September Precipitation Trends in Alstermo

The chart displays monthly precipitation patterns in Alstermo, 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 Alstermo, September typically receives around 65 mm (2.6 inches) of precipitation spread over approximately 10 days.
JanFebMarAprMayJunJulAugSepOctNovDec404951275752677365694759
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Alstermo

In Alstermo in September, humidity is 81%. With an average temperature of 13°C (55°F), this humidity feels like a damp blanket wrapping around you, making strolls outdoors feel heavy and slightly oppressive, which may be less than ideal for travelers looking to explore comfortably.

September Average Humidity in Alstermo

This chart illustrates the average monthly humidity levels in Alstermo, 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 Alstermo is approximately 81%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec90%89%88%82%72%68%68%73%81%87%89%88%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Alstermo

In Alstermo in September, the maximum UV index reaches 5, which corresponds to a moderate Exposure Category. Under these conditions, the estimated time to burn is approximately 30 minutes. For more details, you can check the Hourly UV Index in Alstermo.

Maximum UV Index Levels in Alstermo for September

The chart shows the monthly maximum UV Index (UVI) for Alstermo 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 Alstermo typically reaches 5, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec123567765211
Data source: Alstermo 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 Alstermo Compares to Other Months

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

This table compares monthly weather conditions in Alstermo, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather0°C (33°F)40 mm (1.6 inches)90%low
February Weather0°C (32°F)49 mm (1.9 inches)89%low
March Weather2°C (36°F)51 mm (2.0 inches)88%moderate
April Weather6°C (43°F)27 mm (1.1 inches)82%moderate
May Weather11°C (52°F)57 mm (2.3 inches)72%high
June Weather17°C (62°F)52 mm (2.1 inches)68%high
July Weather17°C (64°F)67 mm (2.6 inches)68%high
August Weather17°C (62°F)73 mm (2.9 inches)73%high
September Weather13°C (55°F)65 mm (2.6 inches)81%moderate
October Weather8°C (48°F)69 mm (2.7 inches)87%low
November Weather5°C (41°F)47 mm (1.9 inches)89%low
December Weather1°C (34°F)59 mm (2.3 inches)88%low

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