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December Weather in Three Rivers, United States

Last updated: June 24, 2025

In Three Rivers, United States, the average temperature in December hovers around -1°C (31°F), with extremes ranging from a chilly -17°C (2°F) to a mild 16°C (61°F). Expect a precipitation amount of 82 mm (3.2 in) spread over 15 days, accompanied by a high average humidity of 88%. Embrace the crisp air and prepare for cozy indoor activities!

December Temperature in Three Rivers

In December in Three Rivers, the average temperature is -1°C (31°F), with maximums reaching 16°C (61°F) and minimums plummeting to -17°C (2°F). Be prepared for a wide temperature range if you plan to visit during this time.

December Weather in Three Rivers: Daily Temperature Highs, Lows, and Averages

The chart illustrates December temperature patterns in Three Rivers, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Three Rivers, December typically has an average temperature of -1°C (31°F), with highs reaching up to 16°C (61°F) and lows dropping to around -17°C (2°F).
JanFebMarAprMayJunJulAugSepOctNovDec303135414957666556443630
Data source: Temperature data for Three Rivers 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 Three Rivers

In Three Rivers in December, the precipitation amount is 82 mm (3.2 in) over the course of 15 days.

December Precipitation Trends in Three Rivers

The chart displays monthly precipitation patterns in Three Rivers, 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 Three Rivers, December typically receives around 82 mm (3.2 inches) of precipitation spread over approximately 15 days.
JanFebMarAprMayJunJulAugSepOctNovDec871046561412481032437282
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Three Rivers

In Three Rivers in December, humidity is 88%. With an average temperature of -1°C (31°F), this humidity feels like a biting cold that penetrates your clothing, making outdoor exploration challenging and the air clingy, adding an extra chill that can make you feel even colder than the temperature suggests.

December Average Humidity in Three Rivers

This chart illustrates the average monthly humidity levels in Three Rivers, 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 Three Rivers is approximately 88%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec87%87%87%86%79%80%77%60%57%76%87%88%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Three Rivers

In Three Rivers 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 Three Rivers, you can visit Hourly UV Index in Three Rivers.

Maximum UV Index Levels in Three Rivers for December

The chart shows the monthly maximum UV Index (UVI) for Three Rivers 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 Three Rivers typically reaches 2, which falls under the low exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec3579111110108642
Data source: Three Rivers 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 Three Rivers Compares to Other Months

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

This table compares monthly weather conditions in Three Rivers, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-1°C (31°F)87 mm (3.4 inches)87%moderate
February Weather-1°C (31°F)104 mm (4.1 inches)87%moderate
March Weather2°C (36°F)65 mm (2.6 inches)87%high
April Weather5°C (41°F)61 mm (2.4 inches)86%very high
May Weather9°C (49°F)41 mm (1.6 inches)79%extreme
June Weather14°C (58°F)24 mm (0.9 inches)80%extreme
July Weather19°C (66°F)8 mm (0.3 inches)77%very high
August Weather18°C (66°F)10 mm (0.4 inches)60%very high
September Weather13°C (56°F)32 mm (1.3 inches)57%very high
October Weather7°C (44°F)43 mm (1.7 inches)76%high
November Weather2°C (36°F)72 mm (2.8 inches)87%moderate
December Weather-1°C (31°F)82 mm (3.2 inches)88%low

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