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December Weather in Nagu, Finland

Last updated: August 23, 2025

In December, the average temperature in Nagu, Finland hovers around 1°C (35°F). However, expect a wide range of temperatures, with minimums plunging to -14°C (7°F) and maximums reaching up to 7°C (45°F). You'll likely encounter precipitation averaging 88 mm (3.5 in) over 17 days, coupled with a high average humidity of 89%.

December Temperature in Nagu

In December in Nagu, the average temperature is 1°C (35°F), with a maximum that can reach 7°C (45°F) and a minimum that can drop as low as -14°C (7°F). It's advisable to pack warm clothing and be prepared for chilly weather if you're planning to visit during this time.

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

The chart illustrates December temperature patterns in Nagu, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Nagu, December typically has an average temperature of 1°C (35°F), with highs reaching up to 7°C (45°F) and lows dropping to around -14°C (7°F).
JanFebMarAprMayJunJulAugSepOctNovDec312832384859646356484134
Data source: Temperature data for Nagu 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 Nagu

In Nagu in December, the precipitation amount is 88 mm (3.5 in) spread over 17 days.

December Precipitation Trends in Nagu

The chart displays monthly precipitation patterns in Nagu, 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 Nagu, December typically receives around 88 mm (3.5 inches) of precipitation spread over approximately 17 days.
JanFebMarAprMayJunJulAugSepOctNovDec5143452939376085781047488
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Nagu

In Nagu in December humidity is 89%. With an average temperature of 1°C (35°F), this humidity feels like a chilly dampness enveloping you, making traveling quite uncomfortable as every breath brings a lingering chill and the air feels heavy, often leading to a sense of unease as you navigate through the damp conditions.

December Average Humidity in Nagu

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

In Nagu 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 Nagu.

Maximum UV Index Levels in Nagu for December

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

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

This table compares monthly weather conditions in Nagu, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather0°C (31°F)51 mm (2.0 inches)92%low
February Weather-2°C (28°F)43 mm (1.7 inches)90%low
March Weather0°C (32°F)45 mm (1.8 inches)89%moderate
April Weather3°C (39°F)29 mm (1.1 inches)85%moderate
May Weather9°C (48°F)39 mm (1.5 inches)77%moderate
June Weather15°C (59°F)37 mm (1.4 inches)78%high
July Weather18°C (64°F)60 mm (2.4 inches)78%high
August Weather17°C (63°F)85 mm (3.3 inches)79%moderate
September Weather13°C (56°F)78 mm (3.1 inches)86%moderate
October Weather9°C (48°F)104 mm (4.1 inches)90%low
November Weather5°C (42°F)74 mm (2.9 inches)91%low
December Weather1°C (35°F)88 mm (3.5 inches)89%low

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