nomadseason

December Weather in Perna, Finland

Last updated: August 23, 2025

In December, the average temperature in Perna, Finland hovers around -1°C (30°F), with a chill that can dip as low as -20°C (-4°F) and reach a maximum of 7°C (44°F). Expect 75 mm (2.9 in) of precipitation over about 16 days, contributing to a notably high average humidity of 96%. Prepare for a cool, damp month that embodies the essence of winter!

December Temperature in Perna

In December in Perna, the average temperature is -1°C (30°F). The maximum can reach 7°C (44°F), while the minimum can be as low as -20°C (-4°F). Be sure to pack warm clothing and prepare for brisk winter conditions during your visit.

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

The chart illustrates December temperature patterns in Perna, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Perna, December typically has an average temperature of -1°C (30°F), with highs reaching up to 7°C (44°F) and lows dropping to around -20°C (-4°F).
JanFebMarAprMayJunJulAugSepOctNovDec272530405162656253443730
Data source: Temperature data for Perna 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 Perna

In Perna in December, the precipitation amount is 75 mm (2.9 in) spread over 16 days.

December Precipitation Trends in Perna

The chart displays monthly precipitation patterns in Perna, 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 Perna, December typically receives around 75 mm (2.9 inches) of precipitation spread over approximately 16 days.
JanFebMarAprMayJunJulAugSepOctNovDec544948464850677460805875
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
Choose your preferred precipitation unit

December Humidity in Perna

In Perna in December humidity is 96%. With an average temperature of -1°C (30°F), this humidity feels like a chilling dampness that seeps into your clothes, making every step outdoors uncomfortable and invigoratingly biting, leaving you yearning for warmth and shelter while exploring.

December Average Humidity in Perna

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

In Perna 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 Perna.

Maximum UV Index Levels in Perna for December

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

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

This table compares monthly weather conditions in Perna, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-3°C (27°F)54 mm (2.1 inches)98%low
February Weather-4°C (25°F)49 mm (1.9 inches)96%low
March Weather-1°C (31°F)48 mm (1.9 inches)93%moderate
April Weather4°C (40°F)46 mm (1.8 inches)87%moderate
May Weather11°C (51°F)48 mm (1.9 inches)75%moderate
June Weather17°C (62°F)50 mm (2.0 inches)74%high
July Weather18°C (65°F)67 mm (2.6 inches)80%high
August Weather17°C (62°F)74 mm (2.9 inches)85%moderate
September Weather12°C (53°F)60 mm (2.4 inches)90%moderate
October Weather7°C (45°F)80 mm (3.2 inches)94%low
November Weather3°C (37°F)58 mm (2.3 inches)94%low
December Weather-1°C (30°F)75 mm (2.9 inches)96%low

Compare Perna's Climate with Cities Worldwide