December Weather in Three Rivers, United States

Last updated: June 24, 2025

In December, the average temperature in Three Rivers, United States is a pleasant 15°C (60°F). However, temperatures can vary significantly, dropping as low as -2°C (29°F) and soaring up to 34°C (93°F). Rainfall is moderate, with an average precipitation amount of 41 mm (1.6 in) spread over 5 days. Despite these fluctuations, expect a high humidity level of 86%, adding to the atmosphere of this vibrant locale.

December Temperature in Three Rivers

In December in Three Rivers, the average temperature is 15°C (60°F). Maximum temperatures can reach 34°C (93°F), while minimums can drop as low as -2°C (29°F). Be prepared for a wide range of temperatures, making it essential to pack for both warm days and chilly nights during your travels.

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 15°C (60°F), with highs reaching up to 34°C (93°F) and lows dropping to around -2°C (29°F).

Data source: Temperature data for Three Rivers generated using information from the Copernicus Climate Change Service.

December Precipitation in Three Rivers

In Three Rivers in December, the precipitation amount is 41 mm (1.6 in) over a period of 5 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 41 mm (1.6 inches) of precipitation spread over approximately 5 days.

Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.

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Millimeters (mm) Inches (in)

December Humidity in Three Rivers

In Three Rivers in December, humidity is 86%. With an average temperature of 15°C (60°F), this humidity feels like a warm, muggy embrace that can make exploring the area feel sticky and heavy, often leading you to seek shade or cool refreshments more frequently as you navigate the sights.

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 86%, offering insight into how humid the weather typically is during this month.

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 reaches 5, which corresponds to a moderate Exposure Category. Under these conditions, the estimated time to burn is approximately 30 minutes. For more details, you can check the 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 5, which falls under the moderate exposure category.

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.
	Temperature	Precipitation	Humidity	UV
January Weather	14°C (57°F)	28 mm (1.1 inches)	79%	moderate
February Weather	15°C (60°F)	36 mm (1.4 inches)	79%	very high
March Weather	20°C (69°F)	46 mm (1.8 inches)	74%	very high
April Weather	23°C (74°F)	58 mm (2.3 inches)	76%	extreme
May Weather	27°C (81°F)	89 mm (3.5 inches)	81%	extreme
June Weather	29°C (85°F)	82 mm (3.2 inches)	76%	extreme
July Weather	30°C (87°F)	74 mm (2.9 inches)	66%	extreme
August Weather	31°C (88°F)	59 mm (2.3 inches)	58%	extreme
September Weather	28°C (83°F)	92 mm (3.6 inches)	65%	extreme
October Weather	24°C (76°F)	55 mm (2.2 inches)	74%	very high
November Weather	18°C (65°F)	40 mm (1.6 inches)	81%	high
December Weather	15°C (60°F)	41 mm (1.6 inches)	86%	moderate