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September Weather in Grundsund, Sweden

Last updated: August 27, 2025

In September, the average temperature in Grundsund, Sweden hovers around 14°C (57°F). Expect a cozy range, with minimums at 3°C (38°F) and maximums reaching 23°C (73°F). Be prepared for some wet weather, as precipitation can reach 105 mm (4.1 in) over 15 days, while average humidity sits at a sticky 86%.

September Temperature in Grundsund

In September in Grundsund, the average temperature is 14°C (57°F). The maximum can reach 23°C (73°F) and the minimum can be as low as 3°C (38°F). It's a great time for travelers to enjoy mild weather, making it perfect for outdoor activities and exploration.

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

The chart illustrates September temperature patterns in Grundsund, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Grundsund, September typically has an average temperature of 14°C (57°F), with highs reaching up to 23°C (73°F) and lows dropping to around 3°C (38°F).
JanFebMarAprMayJunJulAugSepOctNovDec363538445261646257504337
Data source: Temperature data for Grundsund 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 Grundsund

In Grundsund in September, the total precipitation amount is 105 mm (4.1 in) over a span of 15 days.

September Precipitation Trends in Grundsund

The chart displays monthly precipitation patterns in Grundsund, 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 Grundsund, September typically receives around 105 mm (4.1 inches) of precipitation spread over approximately 15 days.
JanFebMarAprMayJunJulAugSepOctNovDec587067346066791041051219180
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Grundsund

In Grundsund in September humidity is 86%. With an average temperature of 14°C (57°F), this humidity feels like a heavy blanket enveloping you, making travel feel oppressive and uncomfortably sticky.

September Average Humidity in Grundsund

This chart illustrates the average monthly humidity levels in Grundsund, 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 Grundsund is approximately 86%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec94%92%89%82%73%71%72%77%86%92%93%93%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Grundsund

In Grundsund 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 Grundsund for better planning.

Maximum UV Index Levels in Grundsund for September

The chart shows the monthly maximum UV Index (UVI) for Grundsund 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 Grundsund typically reaches 4, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec123467764211
Data source: Grundsund 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 Grundsund Compares to Other Months

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

This table compares monthly weather conditions in Grundsund, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather2°C (36°F)58 mm (2.3 inches)94%low
February Weather1°C (35°F)70 mm (2.7 inches)92%low
March Weather3°C (38°F)67 mm (2.6 inches)89%moderate
April Weather7°C (44°F)34 mm (1.4 inches)82%moderate
May Weather11°C (53°F)60 mm (2.4 inches)73%high
June Weather16°C (61°F)66 mm (2.6 inches)71%high
July Weather18°C (64°F)79 mm (3.1 inches)72%high
August Weather17°C (62°F)104 mm (4.1 inches)77%high
September Weather14°C (57°F)105 mm (4.1 inches)86%moderate
October Weather10°C (50°F)120 mm (4.7 inches)92%low
November Weather6°C (43°F)91 mm (3.6 inches)93%low
December Weather3°C (37°F)80 mm (3.2 inches)93%low

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