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December Weather in Lumijoki, Finland

Last updated: August 23, 2025

In Lumijoki, Finland, the average temperature in December hovers around -4°C (25°F), but it can dip as low as -24°C (-11°F) and peak at a mild 5°C (41°F). Expect about 52 mm (2.0 in) of precipitation spread across 13 days, while the air remains remarkably humid at an average of 99%.

December Temperature in Lumijoki

In December in Lumijoki, the weather can be quite chilly, making it essential for travelers to pack warm clothing and be prepared for a wide range of temperatures.

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

The chart illustrates December temperature patterns in Lumijoki, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Lumijoki, December typically has an average temperature of -4°C (25°F), with highs reaching up to 5°C (41°F) and lows dropping to around -24°C (-11°F).
JanFebMarAprMayJunJulAugSepOctNovDec191825344657625849393124
Data source: Temperature data for Lumijoki 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 Lumijoki

In Lumijoki in December, the total precipitation amount is 52 mm (2.0 in) over the course of 13 days.

December Precipitation Trends in Lumijoki

The chart displays monthly precipitation patterns in Lumijoki, 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 Lumijoki, December typically receives around 52 mm (2.0 inches) of precipitation spread over approximately 13 days.
JanFebMarAprMayJunJulAugSepOctNovDec373737375356789671785952
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Lumijoki

In Lumijoki in December humidity is 99%. With an average temperature of -4°C (25°F), this humidity feels like a heavy blanket wrapped around you, making every step outside feel like a toe-curling challenge as the cold air grips you and the dampness seeps into your bones, leaving you longing for the warmth of a cozy indoor space.

December Average Humidity in Lumijoki

This chart illustrates the average monthly humidity levels in Lumijoki, 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 Lumijoki is approximately 99%, 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 December generated using information from the Copernicus Climate Change Service.

December UV Index in Lumijoki

In Lumijoki 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 Lumijoki.

Maximum UV Index Levels in Lumijoki for December

The chart shows the monthly maximum UV Index (UVI) for Lumijoki 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 Lumijoki typically reaches 1, which falls under the low exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec113446643211
Data source: Lumijoki 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 Lumijoki Compares to Other Months

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

This table compares monthly weather conditions in Lumijoki, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-7°C (20°F)37 mm (1.4 inches)100%low
February Weather-8°C (18°F)37 mm (1.4 inches)98%low
March Weather-4°C (26°F)37 mm (1.5 inches)95%moderate
April Weather1°C (34°F)37 mm (1.5 inches)87%moderate
May Weather8°C (46°F)53 mm (2.1 inches)81%moderate
June Weather14°C (58°F)56 mm (2.2 inches)77%high
July Weather17°C (62°F)78 mm (3.1 inches)79%high
August Weather14°C (58°F)96 mm (3.8 inches)84%moderate
September Weather9°C (49°F)71 mm (2.8 inches)90%moderate
October Weather4°C (40°F)78 mm (3.1 inches)95%low
November Weather0°C (31°F)59 mm (2.3 inches)95%low
December Weather-4°C (25°F)52 mm (2.0 inches)99%low

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