December Weather in Oroville, United States

Last updated: June 24, 2025

In December, the average temperature in Oroville, United States is a cool 9°C (48°F). You can expect temperatures to range from a chilly 0°C (32°F) at its lowest to a pleasant 23°C (73°F) at its highest. During this time, rainfall averages 166 mm (6.5 in) over about 10 days, accompanied by an average humidity of 83%, making for a refreshing yet damp atmosphere.

December Temperature in Oroville

In December in Oroville, the average temperature is 9°C (48°F). Maximums can reach 23°C (73°F), and minimums can be as low as 0°C (32°F). This makes it a perfect time for travelers to enjoy the mild weather while exploring the sights.

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 9°C (48°F), with highs reaching up to 23°C (73°F) and lows dropping to around 0°C (32°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 precipitation amount is 166 mm (6.5 in) over a span of 10 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 166 mm (6.5 inches) of precipitation spread over approximately 10 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 83%. With an average temperature of 9°C (48°F), this humidity feels like an enveloping blanket, making outdoor activities quite uncomfortable and encouraging travelers to seek shelter or shade frequently.

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 83%, 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 3, which corresponds to a moderate Exposure Category. The time to burn is approximately 30 minutes. For more details on the hourly UV index in Oroville, you can check the information here.

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 3, which falls under the moderate 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	9°C (48°F)	202 mm (7.9 inches)	84%	moderate
February Weather	10°C (50°F)	212 mm (8.4 inches)	84%	moderate
March Weather	12°C (53°F)	180 mm (7.1 inches)	83%	high
April Weather	16°C (60°F)	90 mm (3.6 inches)	81%	very high
May Weather	20°C (68°F)	48 mm (1.9 inches)	74%	very high
June Weather	25°C (78°F)	6 mm (0.2 inches)	64%	extreme
July Weather	28°C (83°F)	1 mm (0.0 inches)	44%	extreme
August Weather	27°C (80°F)	1 mm (0.0 inches)	36%	very high
September Weather	23°C (74°F)	10 mm (0.4 inches)	44%	very high
October Weather	18°C (64°F)	59 mm (2.3 inches)	65%	high
November Weather	12°C (54°F)	111 mm (4.4 inches)	84%	moderate
December Weather	9°C (48°F)	166 mm (6.5 inches)	83%	moderate