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September Weather in Stromma, Sweden

Last updated: August 27, 2025

In September, the average temperature in Stromma, Sweden hovers around 13°C (56°F). Expect a minimum chill of 4°C (40°F) and a pleasant maximum of 21°C (69°F). During this month, anticipate approximately 50 mm (2.0 in) of precipitation spread over about 10 days, resulting in an average humidity level of 85%.

September Temperature in Stromma

In September in Stromma, the average temperature is 13°C (56°F). Maximum can reach 21°C (69°F), and minimum can be as low as 4°C (40°F). This makes it a great time for travelers to enjoy mild weather while exploring the sights.

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

The chart illustrates September temperature patterns in Stromma, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Stromma, September typically has an average temperature of 13°C (56°F), with highs reaching up to 21°C (69°F) and lows dropping to around 4°C (40°F).
JanFebMarAprMayJunJulAugSepOctNovDec333234394758636356484236
Data source: Temperature data for Stromma 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 Stromma

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

September Precipitation Trends in Stromma

The chart displays monthly precipitation patterns in Stromma, 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 Stromma, September typically receives around 50 mm (2.0 inches) of precipitation spread over approximately 10 days.
JanFebMarAprMayJunJulAugSepOctNovDec443941264637535751865374
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Stromma

In Stromma in September humidity is 85%. With an average temperature of 13°C (56°F), this humidity feels like a damp chill that wraps around you, making outdoor activities feel heavier and less enjoyable, as layers of clothing cling to the skin and breath becomes visible in the moist air.

September Average Humidity in Stromma

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

In Stromma 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 Stromma for better planning.

Maximum UV Index Levels in Stromma for September

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

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

This table compares monthly weather conditions in Stromma, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather1°C (33°F)44 mm (1.7 inches)90%low
February Weather0°C (32°F)39 mm (1.5 inches)88%low
March Weather1°C (35°F)41 mm (1.6 inches)89%moderate
April Weather4°C (39°F)26 mm (1.0 inches)85%moderate
May Weather8°C (47°F)46 mm (1.8 inches)77%moderate
June Weather14°C (58°F)37 mm (1.4 inches)76%high
July Weather17°C (63°F)53 mm (2.1 inches)74%high
August Weather17°C (63°F)57 mm (2.3 inches)77%moderate
September Weather13°C (56°F)50 mm (2.0 inches)85%moderate
October Weather9°C (48°F)86 mm (3.4 inches)89%low
November Weather5°C (42°F)53 mm (2.1 inches)90%low
December Weather2°C (36°F)74 mm (2.9 inches)87%low

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