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December Weather in Jalasjaervi, Finland

Last updated: August 23, 2025

In December, the average temperature in Jalasjaervi, Finland hovers around -3°C (28°F). Temperatures can drop as low as -26°C (-15°F), while the highs can reach up to 5°C (42°F). Expect about 51 mm (2.0 in) of precipitation spread over 13 days, contributing to a notably high average humidity of 95%.

December Temperature in Jalasjaervi

In December in Jalasjaervi, the average temperature is -3°C (28°F). The maximum can reach 5°C (42°F), while the minimum can plummet to as low as -26°C (-15°F). Be prepared for extremely cold weather and dress accordingly if you're planning to travel during this time.

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

The chart illustrates December temperature patterns in Jalasjaervi, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Jalasjaervi, December typically has an average temperature of -3°C (28°F), with highs reaching up to 5°C (42°F) and lows dropping to around -26°C (-15°F).
JanFebMarAprMayJunJulAugSepOctNovDec242229384860625950413427
Data source: Temperature data for Jalasjaervi 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 Jalasjaervi

In Jalasjaervi in December, the precipitation amount is 51 mm (2.0 in) spread over 13 days.

December Precipitation Trends in Jalasjaervi

The chart displays monthly precipitation patterns in Jalasjaervi, 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 Jalasjaervi, December typically receives around 51 mm (2.0 inches) of precipitation spread over approximately 13 days.
JanFebMarAprMayJunJulAugSepOctNovDec383943445860579269695951
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Jalasjaervi

In Jalasjaervi in December humidity is 95%. With an average temperature of -3°C (28°F), this humidity feels like a biting chill that seeps into your bones, making outdoor travels uncomfortable and urging you to seek warmth and shelter more quickly than you anticipated.

December Average Humidity in Jalasjaervi

This chart illustrates the average monthly humidity levels in Jalasjaervi, 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 Jalasjaervi is approximately 95%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec97%95%92%85%77%74%79%82%89%93%93%95%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Jalasjaervi

In Jalasjaervi 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 Jalasjaervi.

Maximum UV Index Levels in Jalasjaervi for December

The chart shows the monthly maximum UV Index (UVI) for Jalasjaervi 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 Jalasjaervi typically reaches 1, which falls under the low exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec113456653211
Data source: Jalasjaervi 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 Jalasjaervi Compares to Other Months

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

This table compares monthly weather conditions in Jalasjaervi, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-4°C (24°F)38 mm (1.5 inches)97%low
February Weather-5°C (22°F)39 mm (1.5 inches)95%low
March Weather-2°C (29°F)43 mm (1.7 inches)92%moderate
April Weather3°C (38°F)44 mm (1.7 inches)85%moderate
May Weather9°C (49°F)58 mm (2.3 inches)77%moderate
June Weather15°C (60°F)60 mm (2.4 inches)74%high
July Weather17°C (62°F)57 mm (2.2 inches)79%high
August Weather15°C (59°F)92 mm (3.6 inches)82%moderate
September Weather10°C (50°F)69 mm (2.7 inches)89%moderate
October Weather5°C (41°F)69 mm (2.7 inches)93%low
November Weather1°C (34°F)59 mm (2.3 inches)93%low
December Weather-3°C (28°F)51 mm (2.0 inches)95%low

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