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December Weather in Black River, United States

Last updated: June 24, 2025

In Black River, United States, the average temperature in December hovers around -3°C (27°F), but be prepared for a wide range—temperatures can plunge to a minimum of -27°C (-16°F) and soar to a maximum of 16°C (61°F). Expect 110 mm (4.3 in) of precipitation spread over 15 days and an average humidity level of 86%. Whether you're braving the chill or enjoying the fleeting warmth, be ready for a month of varied weather!

December Temperature in Black River

In December in Black River, the average temperature is -3°C (27°F), with maximums reaching 16°C (61°F) and minimums dropping as low as -27°C (-16°F). Travelers should be prepared for a wide range of temperatures, making layered clothing a necessity.

December Weather in Black River: Daily Temperature Highs, Lows, and Averages

The chart illustrates December temperature patterns in Black River, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Black River, December typically has an average temperature of -3°C (27°F), with highs reaching up to 16°C (61°F) and lows dropping to around -27°C (-16°F).
JanFebMarAprMayJunJulAugSepOctNovDec212431445665706861513627
Data source: Temperature data for Black River 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 Black River

In Black River in December, the precipitation amount is 110 mm (4.3 in) over the course of 15 days.

December Precipitation Trends in Black River

The chart displays monthly precipitation patterns in Black River, 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 Black River, December typically receives around 110 mm (4.3 inches) of precipitation spread over approximately 15 days.
JanFebMarAprMayJunJulAugSepOctNovDec100949512711211716912684169131110
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Black River

In Black River in December, humidity is 86%. With an average temperature of -3°C (27°F), this humidity feels like a biting chill, making travel uncomfortable as the cold air penetrates through clothing, leaving you feeling damp and uneasy.

December Average Humidity in Black River

This chart illustrates the average monthly humidity levels in Black River, 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 Black River is approximately 86%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec90%90%87%88%82%79%78%76%78%84%89%86%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Black River

In Black River in December, the maximum UV index is 2, which corresponds to a low exposure category. With this level of UV radiation, the time to burn is approximately 45 minutes. To learn more about the hourly UV index in Black River, you can visit Hourly UV Index in Black River.

Maximum UV Index Levels in Black River for December

The chart shows the monthly maximum UV Index (UVI) for Black River 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 Black River typically reaches 2, which falls under the low exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec246899997532
Data source: Black River 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 Black River Compares to Other Months

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

This table compares monthly weather conditions in Black River, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-6°C (21°F)100 mm (3.9 inches)90%low
February Weather-4°C (24°F)94 mm (3.7 inches)90%moderate
March Weather0°C (31°F)95 mm (3.7 inches)87%high
April Weather6°C (44°F)127 mm (5.0 inches)88%very high
May Weather14°C (57°F)112 mm (4.4 inches)82%very high
June Weather18°C (65°F)117 mm (4.6 inches)79%very high
July Weather21°C (71°F)169 mm (6.7 inches)78%very high
August Weather20°C (69°F)126 mm (5.0 inches)76%very high
September Weather16°C (62°F)84 mm (3.3 inches)78%high
October Weather10°C (51°F)169 mm (6.6 inches)84%moderate
November Weather2°C (36°F)131 mm (5.2 inches)89%moderate
December Weather-3°C (27°F)110 mm (4.3 inches)86%low

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