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December Weather in Mikkeli, Finland

Last updated: August 23, 2025

In December, the average temperature in Mikkeli, Finland hovers around -3°C (27°F). Expect chilly extremes, with minimum temperatures plunging to -22°C (-7°F) and peaks reaching up to 4°C (40°F). Precipitation is frequent, totaling 70 mm (2.8 in) over about 15 days, while the average humidity remains a brisk 96%. Prepare for a frosty and damp experience!

December Temperature in Mikkeli

In December in Mikkeli, the average temperature is -3°C (27°F). Maximums can reach 4°C (40°F) and minimums can be as low as -22°C (-7°F). Be sure to dress warmly and prepare for a range of cold temperatures during your travels.

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

The chart illustrates December temperature patterns in Mikkeli, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Mikkeli, December typically has an average temperature of -3°C (27°F), with highs reaching up to 4°C (40°F) and lows dropping to around -22°C (-7°F).
JanFebMarAprMayJunJulAugSepOctNovDec232128364861636051423426
Data source: Temperature data for Mikkeli 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 Mikkeli

In Mikkeli in December, the total precipitation amount reaches 70 mm (2.8 in) over the course of 15 days.

December Precipitation Trends in Mikkeli

The chart displays monthly precipitation patterns in Mikkeli, 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 Mikkeli, December typically receives around 70 mm (2.8 inches) of precipitation spread over approximately 15 days.
JanFebMarAprMayJunJulAugSepOctNovDec494544445366818671765870
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Mikkeli

In Mikkeli in December humidity is 96%. With an average temperature of -3°C (27°F), this humidity feels like a biting cold that penetrates your clothes, making travel uncomfortable as the dampness clings to your skin and leaves you feeling chilled to the bone.

December Average Humidity in Mikkeli

This chart illustrates the average monthly humidity levels in Mikkeli, 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 Mikkeli is approximately 96%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec98%96%93%87%75%74%80%85%90%94%94%96%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Mikkeli

In Mikkeli 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 Mikkeli.

Maximum UV Index Levels in Mikkeli for December

The chart shows the monthly maximum UV Index (UVI) for Mikkeli 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 Mikkeli typically reaches 1, which falls under the low exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec113456753211
Data source: Mikkeli 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 Mikkeli Compares to Other Months

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

This table compares monthly weather conditions in Mikkeli, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-5°C (23°F)49 mm (1.9 inches)98%low
February Weather-6°C (22°F)45 mm (1.8 inches)96%low
March Weather-2°C (28°F)44 mm (1.7 inches)93%moderate
April Weather2°C (36°F)44 mm (1.7 inches)87%moderate
May Weather9°C (49°F)53 mm (2.1 inches)75%moderate
June Weather16°C (61°F)66 mm (2.6 inches)74%high
July Weather17°C (64°F)81 mm (3.2 inches)80%high
August Weather16°C (60°F)86 mm (3.4 inches)85%moderate
September Weather11°C (51°F)71 mm (2.8 inches)90%moderate
October Weather6°C (42°F)76 mm (3.0 inches)94%low
November Weather1°C (35°F)58 mm (2.3 inches)94%low
December Weather-3°C (27°F)70 mm (2.8 inches)96%low

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