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September Weather in Pomarkku, Finland

Last updated: August 23, 2025

In Pomarkku, Finland, the average temperature in September hovers around 11°C (52°F). Temperatures can dip as low as -1°C (30°F) and rise to a pleasant 24°C (76°F). Expect about 75 mm (3.0 in) of precipitation spread over 12 days, accompanied by an average humidity level of 86%.

September Temperature in Pomarkku

In September in Pomarkku, the average temperature is 11°C (52°F). Maximums can reach 24°C (76°F), while minimums can drop as low as -1°C (30°F). It's a perfect time for travelers to enjoy mild weather while being prepared for a range of temperatures.

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

The chart illustrates September temperature patterns in Pomarkku, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Pomarkku, September typically has an average temperature of 11°C (52°F), with highs reaching up to 24°C (76°F) and lows dropping to around -1°C (30°F).
JanFebMarAprMayJunJulAugSepOctNovDec272430394960636052433630
Data source: Temperature data for Pomarkku 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 Pomarkku

In Pomarkku in September, the precipitation amount is 75 mm (3.0 in) over the course of 12 days.

September Precipitation Trends in Pomarkku

The chart displays monthly precipitation patterns in Pomarkku, 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 Pomarkku, September typically receives around 75 mm (3.0 inches) of precipitation spread over approximately 12 days.
JanFebMarAprMayJunJulAugSepOctNovDec4243454443588110675816467
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Pomarkku

In Pomarkku in September humidity is 86%. With an average temperature of 11°C (52°F), this humidity feels like a damp chill that seeps into your bones, making outdoor activities less enjoyable and prompting travelers to seek sheltered spots or indoor attractions to escape the uncomfortable dampness.

September Average Humidity in Pomarkku

This chart illustrates the average monthly humidity levels in Pomarkku, 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 Pomarkku is approximately 86%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec92%90%89%85%77%78%78%79%86%90%91%89%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Pomarkku

In Pomarkku 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 Pomarkku, you can check the information here.

Maximum UV Index Levels in Pomarkku for September

The chart shows the monthly maximum UV Index (UVI) for Pomarkku 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 Pomarkku typically reaches 3, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec113456653211
Data source: Pomarkku 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 Pomarkku Compares to Other Months

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

This table compares monthly weather conditions in Pomarkku, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-3°C (27°F)42 mm (1.6 inches)92%low
February Weather-4°C (25°F)43 mm (1.7 inches)90%low
March Weather-1°C (30°F)45 mm (1.8 inches)89%moderate
April Weather4°C (39°F)44 mm (1.7 inches)85%moderate
May Weather10°C (49°F)43 mm (1.7 inches)77%moderate
June Weather16°C (61°F)58 mm (2.3 inches)78%high
July Weather17°C (64°F)81 mm (3.2 inches)78%high
August Weather16°C (61°F)106 mm (4.2 inches)79%moderate
September Weather11°C (52°F)75 mm (3.0 inches)86%moderate
October Weather6°C (43°F)80 mm (3.2 inches)90%low
November Weather2°C (37°F)64 mm (2.5 inches)91%low
December Weather-1°C (30°F)66 mm (2.6 inches)89%low

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