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December Weather in Sylva, Russian Federation

Last updated: August 27, 2025

In December, the average temperature in Sylva, Russian Federation dips to a chilly -10°C (14°F). Be prepared for extremes, as temperatures can plummet to a minimum of -30°C (-21°F), while the maximum can reach up to 4°C (40°F). With about 40 mm (1.6 in) of precipitation spread across 11 days, the air remains quite humid, averaging at 93%. Bundle up and enjoy the wintry atmosphere!

December Temperature in Sylva

In December in Sylva, the average temperature is -10°C (14°F). The maximum can reach 4°C (40°F), and the minimum can be as low as -30°C (-21°F). Travelers should be prepared for cold conditions and pack appropriate winter gear when visiting during this time.

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

The chart illustrates December temperature patterns in Sylva, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Sylva, December typically has an average temperature of -10°C (14°F), with highs reaching up to 4°C (40°F) and lows dropping to around -30°C (-21°F).
JanFebMarAprMayJunJulAugSepOctNovDec91223385157646048382314
Data source: Temperature data for Sylva 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 Sylva

In Sylva in December, the precipitation amount is 40 mm (1.6 in) spread over a duration of 11 days.

December Precipitation Trends in Sylva

The chart displays monthly precipitation patterns in Sylva, 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 Sylva, December typically receives around 40 mm (1.6 inches) of precipitation spread over approximately 11 days.
JanFebMarAprMayJunJulAugSepOctNovDec364147515883859666584840
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Sylva

In Sylva in December, humidity is 93%. With an average temperature of -10°C (14°F), this humidity feels like an invisible weight on your skin, making every breath feel thick and heavy, while the cold air bites sharply, creating a contrasting and uncomfortable chill that can make traveling outdoors feel like a daunting challenge.

December Average Humidity in Sylva

This chart illustrates the average monthly humidity levels in Sylva, 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 Sylva is approximately 93%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec99%96%95%90%78%70%82%82%89%90%95%93%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Sylva

In Sylva 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 Sylva.

Maximum UV Index Levels in Sylva for December

The chart shows the monthly maximum UV Index (UVI) for Sylva 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 Sylva typically reaches 1, which falls under the low exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec124567764311
Data source: Sylva 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 Sylva Compares to Other Months

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

This table compares monthly weather conditions in Sylva, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-13°C (9°F)35 mm (1.4 inches)99%low
February Weather-11°C (13°F)41 mm (1.6 inches)96%low
March Weather-5°C (23°F)47 mm (1.9 inches)95%moderate
April Weather3°C (38°F)51 mm (2.0 inches)90%moderate
May Weather11°C (51°F)58 mm (2.3 inches)78%high
June Weather14°C (57°F)83 mm (3.3 inches)70%high
July Weather18°C (65°F)85 mm (3.3 inches)82%high
August Weather15°C (60°F)96 mm (3.8 inches)81%high
September Weather9°C (48°F)66 mm (2.6 inches)89%moderate
October Weather3°C (38°F)58 mm (2.3 inches)90%moderate
November Weather-5°C (23°F)48 mm (1.9 inches)94%low
December Weather-10°C (14°F)40 mm (1.6 inches)93%low

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