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December Weather in Onega, Russian Federation

Last updated: August 27, 2025

In December, the average temperature in Onega, Russian Federation hovers around -5°C (23°F), with a chilly minimum plunging to -21°C (-6°F) and a notable maximum reaching up to 3°C (37°F). Expect around 60 mm (2.4 in) of precipitation spread over 18 days, contributing to an average humidity level of a brisk 97%. Be prepared for a cold and damp atmosphere!

December Temperature in Onega

In December in Onega, the average temperature is -5°C (23°F), with maximums reaching 3°C (37°F) and minimums dropping as low as -21°C (-6°F). Travelers should prepare for chilly weather and dress warmly to fully enjoy their visit.

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

The chart illustrates December temperature patterns in Onega, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Onega, December typically has an average temperature of -5°C (23°F), with highs reaching up to 3°C (37°F) and lows dropping to around -21°C (-6°F).
JanFebMarAprMayJunJulAugSepOctNovDec191724334456625850403223
Data source: Temperature data for Onega 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 Onega

In Onega in December, the precipitation amount is 60 mm (2.4 in) over the course of 18 days.

December Precipitation Trends in Onega

The chart displays monthly precipitation patterns in Onega, 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 Onega, December typically receives around 60 mm (2.4 inches) of precipitation spread over approximately 18 days.
JanFebMarAprMayJunJulAugSepOctNovDec514548384556871171141147260
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Onega

In Onega in December humidity is 97%. With an average temperature of -5°C (23°F), this humidity feels like an icy grip on your skin, making every breath seem sharper and the air heavier, which can make traveling quite uncomfortable and challenging.

December Average Humidity in Onega

This chart illustrates the average monthly humidity levels in Onega, 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 Onega is approximately 97%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec100%98%94%88%82%78%81%87%90%95%98%97%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Onega

In Onega 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 Onega.

Maximum UV Index Levels in Onega for December

The chart shows the monthly maximum UV Index (UVI) for Onega 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 Onega typically reaches 1, which falls under the low exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec112356653211
Data source: Onega 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 Onega Compares to Other Months

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

This table compares monthly weather conditions in Onega, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-7°C (20°F)51 mm (2.0 inches)100%low
February Weather-8°C (18°F)45 mm (1.8 inches)98%low
March Weather-4°C (24°F)48 mm (1.9 inches)94%low
April Weather1°C (33°F)38 mm (1.5 inches)88%moderate
May Weather7°C (44°F)45 mm (1.8 inches)82%moderate
June Weather13°C (56°F)56 mm (2.2 inches)78%high
July Weather16°C (62°F)87 mm (3.4 inches)81%high
August Weather15°C (59°F)117 mm (4.6 inches)87%moderate
September Weather10°C (51°F)114 mm (4.5 inches)90%moderate
October Weather5°C (40°F)114 mm (4.5 inches)95%low
November Weather0°C (32°F)72 mm (2.8 inches)98%low
December Weather-5°C (23°F)60 mm (2.4 inches)97%low

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