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September Weather in Alunda, Sweden

Last updated: August 27, 2025

In September, the average temperature in Alunda, Sweden hovers around 12°C (54°F). The temperature can range from a chilly -2°C (29°F) to a warm 26°C (79°F). Expect approximately 50 mm (2.0 in) of precipitation over about 10 days, with an average humidity of 85%, creating a vibrant and refreshing atmosphere.

September Temperature in Alunda

In September in Alunda, the average temperature is 12°C (54°F), with maximums reaching 26°C (79°F) and minimums dipping as low as -2°C (29°F). This variation in temperatures makes it essential for travelers to pack layers to stay comfortable throughout the day.

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

The chart illustrates September temperature patterns in Alunda, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Alunda, September typically has an average temperature of 12°C (54°F), with highs reaching up to 26°C (79°F) and lows dropping to around -2°C (29°F).
JanFebMarAprMayJunJulAugSepOctNovDec302934415162646254453832
Data source: Temperature data for Alunda 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 Alunda

In Alunda in September, the precipitation amount is 50 mm (2.0 in) over a span of 10 days.

September Precipitation Trends in Alunda

The chart displays monthly precipitation patterns in Alunda, 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 Alunda, September typically receives around 50 mm (2.0 inches) of precipitation spread over approximately 10 days.
JanFebMarAprMayJunJulAugSepOctNovDec353239316463707651714153
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Alunda

In Alunda in September, humidity is 85%. With an average temperature of 12°C (54°F), this humidity feels like a heavy blanket wrapping around you, making traveling not only uncomfortable but also exhausting as the damp air clings to your skin and slows your movements.

September Average Humidity in Alunda

This chart illustrates the average monthly humidity levels in Alunda, 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 Alunda is approximately 85%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec90%88%89%85%77%76%74%77%85%89%90%88%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Alunda

In Alunda 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 Alunda for better planning.

Maximum UV Index Levels in Alunda for September

The chart shows the monthly maximum UV Index (UVI) for Alunda 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 Alunda typically reaches 4, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec113457754211
Data source: Alunda 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 Alunda Compares to Other Months

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

This table compares monthly weather conditions in Alunda, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-1°C (30°F)35 mm (1.4 inches)90%low
February Weather-2°C (29°F)32 mm (1.3 inches)88%low
March Weather1°C (34°F)39 mm (1.5 inches)89%moderate
April Weather5°C (41°F)31 mm (1.2 inches)85%moderate
May Weather10°C (51°F)64 mm (2.5 inches)77%moderate
June Weather16°C (62°F)63 mm (2.5 inches)76%high
July Weather18°C (64°F)70 mm (2.8 inches)74%high
August Weather16°C (62°F)76 mm (3.0 inches)77%moderate
September Weather12°C (54°F)50 mm (2.0 inches)85%moderate
October Weather7°C (46°F)71 mm (2.8 inches)89%low
November Weather3°C (38°F)41 mm (1.6 inches)90%low
December Weather0°C (32°F)53 mm (2.1 inches)87%low

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