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September Weather in Kirkkonummi, Finland

Last updated: August 23, 2025

In September, the average temperature in Kirkkonummi, Finland hovers around 13°C (56°F), with a comfortable range where the minimum can drop to 6°C (44°F) and the maximum can reach 20°C (68°F). Be prepared for some rain, as 83 mm (3.3 in) of precipitation is expected over approximately 13 days. Don't forget to bring an umbrella, as the average humidity is quite high at 87%!

September Temperature in Kirkkonummi

In September in Kirkkonummi, the average temperature is 13°C (56°F). Maximum temperatures can reach 20°C (68°F), while the minimum can dip as low as 6°C (44°F). Be sure to pack a mix of layers to stay comfortable while exploring!

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

The chart illustrates September temperature patterns in Kirkkonummi, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Kirkkonummi, September typically has an average temperature of 13°C (56°F), with highs reaching up to 20°C (68°F) and lows dropping to around 6°C (44°F).
JanFebMarAprMayJunJulAugSepOctNovDec312932374658636356484134
Data source: Temperature data for Kirkkonummi 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 Kirkkonummi

In Kirkkonummi in September, the precipitation amount is 83 mm (3.3 in) over a span of 13 days.

September Precipitation Trends in Kirkkonummi

The chart displays monthly precipitation patterns in Kirkkonummi, 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 Kirkkonummi, September typically receives around 83 mm (3.3 inches) of precipitation spread over approximately 13 days.
JanFebMarAprMayJunJulAugSepOctNovDec6152543849487382831238682
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Kirkkonummi

In Kirkkonummi in September humidity is 87%. With an average temperature of 13°C (56°F), this humidity feels like a damp blanket wrapping around you, making it challenging to explore comfortably.

September Average Humidity in Kirkkonummi

This chart illustrates the average monthly humidity levels in Kirkkonummi, 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 Kirkkonummi is approximately 87%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec92%91%90%87%76%80%80%83%87%90%91%90%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Kirkkonummi

In Kirkkonummi 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 Kirkkonummi for better planning.

Maximum UV Index Levels in Kirkkonummi for September

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

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

This table compares monthly weather conditions in Kirkkonummi, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather0°C (32°F)61 mm (2.4 inches)92%low
February Weather-2°C (29°F)52 mm (2.1 inches)91%low
March Weather0°C (32°F)54 mm (2.1 inches)90%moderate
April Weather3°C (38°F)38 mm (1.5 inches)87%moderate
May Weather8°C (46°F)49 mm (1.9 inches)76%moderate
June Weather14°C (58°F)48 mm (1.9 inches)80%high
July Weather17°C (63°F)73 mm (2.9 inches)80%high
August Weather17°C (63°F)82 mm (3.2 inches)83%moderate
September Weather13°C (56°F)83 mm (3.3 inches)87%moderate
October Weather9°C (48°F)122 mm (4.8 inches)90%low
November Weather5°C (42°F)86 mm (3.4 inches)91%low
December Weather1°C (35°F)82 mm (3.2 inches)90%low

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