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December Weather in Vantaa, Finland

Last updated: August 23, 2025

In Vantaa, Finland, the average temperature in December hovers around -1°C (31°F). However, you may experience temperatures as low as -18°C (0°F) and as high as 7°C (44°F). Expect significant precipitation, with 73 mm (2.9 in) accumulated over about 15 days of the month, contributing to a notably high average humidity of 95%.

December Temperature in Vantaa

In December in Vantaa, the average temperature is -1°C (31°F). Maximum temperatures can reach 7°C (44°F), while the minimum can drop as low as -18°C (0°F). Travelers should be prepared for chilly weather and dress in layers to stay warm during their visit.

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

The chart illustrates December temperature patterns in Vantaa, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Vantaa, December typically has an average temperature of -1°C (31°F), with highs reaching up to 7°C (44°F) and lows dropping to around -18°C (0°F).
JanFebMarAprMayJunJulAugSepOctNovDec272630395061646254453830
Data source: Temperature data for Vantaa generated using information from the Copernicus Climate Change Service.
Choose your preferred temperature unit
The average of daily temperatures (24 hours) calculated across all days in the month.

December Precipitation in Vantaa

In Vantaa in December, the precipitation amount is 73 mm (2.9 in) over the course of 15 days.

December Precipitation Trends in Vantaa

The chart displays monthly precipitation patterns in Vantaa, 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 Vantaa, December typically receives around 73 mm (2.9 inches) of precipitation spread over approximately 15 days.
JanFebMarAprMayJunJulAugSepOctNovDec554852485661918376896273
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
Choose your preferred precipitation unit

December Humidity in Vantaa

In Vantaa in December, humidity is 95%. With an average temperature of -1°C (31°F), this humidity feels like an icy weight on your skin, making travel uncomfortable and every breath a challenge as the cold dampness clings to your clothes.

December Average Humidity in Vantaa

This chart illustrates the average monthly humidity levels in Vantaa, 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 Vantaa is approximately 95%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec97%95%93%87%75%75%80%83%90%93%94%95%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Vantaa

In Vantaa 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 Vantaa.

Maximum UV Index Levels in Vantaa for December

The chart shows the monthly maximum UV Index (UVI) for Vantaa 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 Vantaa typically reaches 1, which falls under the low exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec113457754211
Data source: Vantaa 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 Vantaa Compares to Other Months

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

This table compares monthly weather conditions in Vantaa, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-3°C (28°F)55 mm (2.2 inches)97%low
February Weather-3°C (26°F)48 mm (1.9 inches)95%low
March Weather-1°C (31°F)52 mm (2.0 inches)93%moderate
April Weather4°C (39°F)48 mm (1.9 inches)86%moderate
May Weather10°C (50°F)56 mm (2.2 inches)75%moderate
June Weather16°C (62°F)61 mm (2.4 inches)75%high
July Weather18°C (65°F)91 mm (3.6 inches)80%high
August Weather17°C (62°F)83 mm (3.3 inches)83%moderate
September Weather12°C (54°F)76 mm (3.0 inches)90%moderate
October Weather7°C (45°F)89 mm (3.5 inches)93%low
November Weather3°C (38°F)62 mm (2.5 inches)94%low
December Weather-1°C (31°F)73 mm (2.9 inches)95%low

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