December Weather in Oroville, United States

Last updated: June 24, 2025

In December, the average temperature in Oroville, United States hovers around -2°C (29°F). Temperatures can dip as low as -24°C (-10°F), while highs reach up to 14°C (57°F). Expect a significant amount of rainfall, with 98 mm (3.9 in) over approximately 16 days, and keep in mind the high humidity at 93%!

December Temperature in Oroville

In December in Oroville, the average temperature is -2°C (29°F), with maximums reaching 14°C (57°F) and minimums plunging as low as -24°C (-10°F). Travelers should prepare for a wide range of temperatures and dress in layers to stay comfortable during their visit.

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

The chart illustrates December temperature patterns in Oroville, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Oroville, December typically has an average temperature of -2°C (29°F), with highs reaching up to 14°C (57°F) and lows dropping to around -24°C (-10°F).

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

December Precipitation in Oroville

In Oroville in December, the total precipitation amount is 98 mm (3.9 in) recorded over a span of 16 days.

December Precipitation Trends in Oroville

The chart displays monthly precipitation patterns in Oroville, 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 Oroville, December typically receives around 98 mm (3.9 inches) of precipitation spread over approximately 16 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 Oroville

In Oroville in December humidity is 93%. With an average temperature of -2°C (29°F), this humidity feels like a dense, frosty blanket that clings to you, making the cold seep into your bones and transforming outdoor activities into a chilly challenge.

December Average Humidity in Oroville

This chart illustrates the average monthly humidity levels in Oroville, 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 Oroville is approximately 93%, 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 Oroville

In Oroville 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 Oroville.

Maximum UV Index Levels in Oroville for December

The chart shows the monthly maximum UV Index (UVI) for Oroville 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 Oroville typically reaches 1, which falls under the low exposure category.

Data source: Oroville 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 Oroville Compares to Other Months

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

This table compares monthly weather conditions in Oroville, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-3°C (27°F)	87 mm (3.4 inches)	90%	low
February Weather	-3°C (27°F)	73 mm (2.9 inches)	91%	moderate
March Weather	3°C (37°F)	81 mm (3.2 inches)	89%	moderate
April Weather	7°C (45°F)	65 mm (2.5 inches)	85%	high
May Weather	13°C (55°F)	42 mm (1.6 inches)	82%	very high
June Weather	17°C (63°F)	31 mm (1.2 inches)	81%	very high
July Weather	21°C (70°F)	8 mm (0.3 inches)	84%	very high
August Weather	20°C (69°F)	12 mm (0.5 inches)	75%	very high
September Weather	15°C (59°F)	40 mm (1.6 inches)	74%	high
October Weather	7°C (44°F)	68 mm (2.7 inches)	85%	moderate
November Weather	2°C (35°F)	92 mm (3.6 inches)	88%	moderate
December Weather	-2°C (29°F)	98 mm (3.9 inches)	93%	low