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December Weather in Kaarina, Finland

Last updated: August 23, 2025

In December, the average temperature in Kaarina, Finland hovers around 0°C (31°F). Expect minimums plunging to -21°C (-5°F) and maximums peaking at 7°C (45°F). During this chilly month, precipitation reaches about 74 mm (2.9 in) over 14 days, accompanied by high humidity levels of 89%, making for a notably damp atmosphere. Prepare accordingly!

December Temperature in Kaarina

In December in Kaarina, the average temperature is 0°C (31°F), with maximums reaching 7°C (45°F) and minimums dropping as low as -21°C (-5°F). Travelers should be prepared for a wide range of temperatures and dress accordingly for chilly conditions.

December Weather in Kaarina: Daily Temperature Highs, Lows, and Averages

The chart illustrates December temperature patterns in Kaarina, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Kaarina, December typically has an average temperature of 0°C (31°F), with highs reaching up to 7°C (45°F) and lows dropping to around -21°C (-5°F).
JanFebMarAprMayJunJulAugSepOctNovDec282631405061646153453831
Data source: Temperature data for Kaarina 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.

December Precipitation in Kaarina

In Kaarina in December, the precipitation amount is 74 mm (2.9 in) over a span of 14 days.

December Precipitation Trends in Kaarina

The chart displays monthly precipitation patterns in Kaarina, with values for each month alongside December’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how December’s conditions compare to those of other months. In Kaarina, December typically receives around 74 mm (2.9 inches) of precipitation spread over approximately 14 days.
JanFebMarAprMayJunJulAugSepOctNovDec484245344845859569785474
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Kaarina

In Kaarina in December, humidity is 89%. With an average temperature of 0°C (31°F), this humidity feels like a chilly blanket enveloping you, making every step feel heavier and the air thick, which can make traveling quite uncomfortable and draining.

December Average Humidity in Kaarina

This chart illustrates the average monthly humidity levels in Kaarina, with December’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In December, average humidity in Kaarina is approximately 89%, 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 December generated using information from the Copernicus Climate Change Service.

December UV Index in Kaarina

In Kaarina in December, the maximum UV index is 1, which corresponds to a low Exposure Category. This means you have a time to burn of 45 minutes. For more details, you can check the Hourly UV Index in Kaarina.

Maximum UV Index Levels in Kaarina for December

The chart shows the monthly maximum UV Index (UVI) for Kaarina in December, 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 December, the maximum UV index in Kaarina typically reaches 1, which falls under the low exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec123457754211
Data source: Kaarina December 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 December Weather in Kaarina Compares to Other Months

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

This table compares monthly weather conditions in Kaarina, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-2°C (28°F)48 mm (1.9 inches)92%low
February Weather-3°C (26°F)42 mm (1.7 inches)90%low
March Weather0°C (31°F)45 mm (1.8 inches)89%moderate
April Weather4°C (40°F)34 mm (1.3 inches)85%moderate
May Weather10°C (50°F)48 mm (1.9 inches)77%moderate
June Weather16°C (61°F)45 mm (1.8 inches)78%high
July Weather18°C (64°F)85 mm (3.4 inches)78%high
August Weather16°C (62°F)95 mm (3.7 inches)79%moderate
September Weather12°C (54°F)69 mm (2.7 inches)86%moderate
October Weather7°C (45°F)78 mm (3.1 inches)90%low
November Weather3°C (38°F)54 mm (2.1 inches)91%low
December Weather0°C (31°F)74 mm (2.9 inches)89%low

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