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September Weather in Eurajoki, Finland

Last updated: August 23, 2025

In Eurajoki, Finland, the average temperature in September hovers around 12°C (54°F), with lows dipping to 2°C (35°F) and highs reaching up to 23°C (74°F). Expect 72 mm (2.8 in) of precipitation spread over 12 days, contributing to the region's average humidity of 86%. Prepare for a mix of cool and damp weather!

September Temperature in Eurajoki

In September in Eurajoki, the average temperature is 12°C (54°F). The maximum can reach 23°C (74°F), while the minimum can be as low as 2°C (35°F). This mild climate makes Eurajoki a great destination for outdoor activities and sightseeing during this time of year.

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

The chart illustrates September temperature patterns in Eurajoki, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Eurajoki, September typically has an average temperature of 12°C (54°F), with highs reaching up to 23°C (74°F) and lows dropping to around 2°C (35°F).
JanFebMarAprMayJunJulAugSepOctNovDec292732394859636154453932
Data source: Temperature data for Eurajoki 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 Eurajoki

In Eurajoki in September, the total precipitation amount is 72 mm (2.8 in) over the course of 12 days.

September Precipitation Trends in Eurajoki

The chart displays monthly precipitation patterns in Eurajoki, 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 Eurajoki, September typically receives around 72 mm (2.8 inches) of precipitation spread over approximately 12 days.
JanFebMarAprMayJunJulAugSepOctNovDec444042364148868872846169
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Eurajoki

In Eurajoki in September, humidity is 86%. With an average temperature of 12°C (54°F), this humidity feels like a damp blanket wrapping around you, making outdoor activities uncomfortable and travel challenging due to the heavy, muggy atmosphere.

September Average Humidity in Eurajoki

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

In Eurajoki 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 Eurajoki, you can check the information here.

Maximum UV Index Levels in Eurajoki for September

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

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

This table compares monthly weather conditions in Eurajoki, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-2°C (30°F)43 mm (1.7 inches)92%low
February Weather-3°C (27°F)40 mm (1.6 inches)90%low
March Weather0°C (32°F)42 mm (1.7 inches)89%moderate
April Weather4°C (39°F)36 mm (1.4 inches)85%moderate
May Weather9°C (48°F)41 mm (1.6 inches)77%moderate
June Weather15°C (59°F)48 mm (1.9 inches)78%high
July Weather17°C (63°F)86 mm (3.4 inches)78%high
August Weather16°C (62°F)88 mm (3.5 inches)79%moderate
September Weather12°C (54°F)72 mm (2.8 inches)86%moderate
October Weather7°C (45°F)84 mm (3.3 inches)90%low
November Weather4°C (39°F)61 mm (2.4 inches)91%low
December Weather0°C (32°F)69 mm (2.7 inches)89%low

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