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December Weather in Lieto, Finland

Last updated: August 23, 2025

In December, the average temperature in Lieto, Finland hovers around -1°C (31°F). While you might experience chilly lows of -20°C (-5°F), the highs can reach a milder 7°C (45°F). Expect about 72 mm (2.8 in) of precipitation spread over 14 days, contributing to a notably high average humidity of 89%. Prepare for a cold, damp environment!

December Temperature in Lieto

In December in Lieto, the average temperature is -1°C (31°F), with maximums reaching 7°C (45°F) and minimums dropping as low as -20°C (-5°F). Travelers should prepare for cold conditions and dress accordingly to fully enjoy the experience.

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

The chart illustrates December temperature patterns in Lieto, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Lieto, December typically has an average temperature of -1°C (31°F), with highs reaching up to 7°C (45°F) and lows dropping to around -20°C (-5°F).
JanFebMarAprMayJunJulAugSepOctNovDec282631405061646153443831
Data source: Temperature data for Lieto 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 Lieto

In Lieto in December, the total precipitation amount is 72 mm (2.8 in) spread over the course of 14 days.

December Precipitation Trends in Lieto

The chart displays monthly precipitation patterns in Lieto, 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 Lieto, December typically receives around 72 mm (2.8 inches) of precipitation spread over approximately 14 days.
JanFebMarAprMayJunJulAugSepOctNovDec484245355147789162765372
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Lieto

In Lieto in December humidity is 89%. With an average temperature of -1°C (31°F), this humidity feels like a biting chill that seeps into your bones, making outdoor activities uncomfortable and urging you to seek warmth indoors.

December Average Humidity in Lieto

This chart illustrates the average monthly humidity levels in Lieto, 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 Lieto 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 Lieto

In Lieto 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 Lieto.

Maximum UV Index Levels in Lieto for December

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

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

This table compares monthly weather conditions in Lieto, 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-4°C (26°F)42 mm (1.7 inches)90%low
March Weather0°C (32°F)45 mm (1.8 inches)89%moderate
April Weather4°C (40°F)35 mm (1.4 inches)85%moderate
May Weather10°C (50°F)51 mm (2.0 inches)77%moderate
June Weather16°C (61°F)47 mm (1.8 inches)78%high
July Weather18°C (64°F)78 mm (3.1 inches)78%high
August Weather16°C (62°F)91 mm (3.6 inches)79%moderate
September Weather12°C (53°F)62 mm (2.4 inches)86%moderate
October Weather7°C (45°F)76 mm (3.0 inches)90%low
November Weather3°C (38°F)53 mm (2.1 inches)91%low
December Weather-1°C (31°F)72 mm (2.8 inches)89%low

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