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September Weather in Ylikiiminki, Finland

Last updated: August 23, 2025

In September, the average temperature in Ylikiiminki, Finland hovers around 9°C (48°F), with a potential drop to a brisk -7°C (20°F) and an occasional peak at a pleasant 24°C (75°F). Expect 78 mm (3.1 in) of precipitation over approximately 13 days, contributing to an overall average humidity of a damp 90%. Prepare accordingly for a blend of chilly days and potential rain!

September Temperature in Ylikiiminki

In September in Ylikiiminki, the average temperature is 9°C (48°F). Maximum temperatures can reach 24°C (75°F), while minimums can drop as low as -7°C (20°F). Given these variations, travelers should be prepared for a wide range of weather conditions.

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

The chart illustrates September temperature patterns in Ylikiiminki, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Ylikiiminki, September typically has an average temperature of 9°C (48°F), with highs reaching up to 24°C (75°F) and lows dropping to around -7°C (20°F).
JanFebMarAprMayJunJulAugSepOctNovDec181624344658625748383023
Data source: Temperature data for Ylikiiminki 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 Ylikiiminki

In Ylikiiminki in September, the precipitation amount is 78 mm (3.1 in) spread over 13 days.

September Precipitation Trends in Ylikiiminki

The chart displays monthly precipitation patterns in Ylikiiminki, 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 Ylikiiminki, September typically receives around 78 mm (3.1 inches) of precipitation spread over approximately 13 days.
JanFebMarAprMayJunJulAugSepOctNovDec4443454255698510578897262
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Ylikiiminki

In Ylikiiminki in September, humidity is 90%. With an average temperature of 9°C (48°F), this humidity feels like a damp chill that seeps into your bones, making outdoor exploration quite uncomfortable and requiring heavier layers to stay warm and dry.

September Average Humidity in Ylikiiminki

This chart illustrates the average monthly humidity levels in Ylikiiminki, 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 Ylikiiminki is approximately 90%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec100%98%95%87%81%77%79%84%90%95%95%99%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Ylikiiminki

In Ylikiiminki 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 Ylikiiminki, you can check the information here.

Maximum UV Index Levels in Ylikiiminki for September

The chart shows the monthly maximum UV Index (UVI) for Ylikiiminki 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 Ylikiiminki typically reaches 3, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec112356643211
Data source: Ylikiiminki 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 Ylikiiminki Compares to Other Months

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

This table compares monthly weather conditions in Ylikiiminki, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-8°C (18°F)44 mm (1.7 inches)100%low
February Weather-9°C (16°F)43 mm (1.7 inches)98%low
March Weather-4°C (25°F)45 mm (1.8 inches)95%low
April Weather1°C (34°F)42 mm (1.7 inches)87%moderate
May Weather8°C (46°F)55 mm (2.2 inches)81%moderate
June Weather14°C (58°F)69 mm (2.7 inches)77%high
July Weather17°C (62°F)85 mm (3.3 inches)79%high
August Weather14°C (57°F)105 mm (4.1 inches)84%moderate
September Weather9°C (48°F)78 mm (3.1 inches)90%moderate
October Weather3°C (38°F)88 mm (3.5 inches)95%low
November Weather-1°C (30°F)72 mm (2.8 inches)95%low
December Weather-5°C (23°F)62 mm (2.5 inches)99%low

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