December Weather in Oakland, United States

Last updated: June 24, 2025

In December, the average temperature in Oakland, United States hovers around 17°C (63°F). Expect a range from a cool 1°C (34°F) to a warm 29°C (85°F). Be prepared for some rain, as 65 mm (2.6 in) of precipitation is likely over about 7 days, and note that the average humidity stands at a high 84%.

December Temperature in Oakland

In December in Oakland, the average temperature is 17°C (63°F). The maximum can reach 29°C (85°F), and the minimum can be as low as 1°C (34°F). This weather makes it a great time for travelers to enjoy a mix of warm days and cool evenings while exploring the area.

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

The chart illustrates December temperature patterns in Oakland, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Oakland, December typically has an average temperature of 17°C (63°F), with highs reaching up to 29°C (85°F) and lows dropping to around 1°C (34°F).

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

December Precipitation in Oakland

In Oakland in December, the total precipitation amount is 65 mm (2.6 in) over a span of 7 days.

December Precipitation Trends in Oakland

The chart displays monthly precipitation patterns in Oakland, 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 Oakland, December typically receives around 65 mm (2.6 inches) of precipitation spread over approximately 7 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 Oakland

In Oakland in December, humidity is 84%. With an average temperature of 17°C (63°F), this humidity feels like a warm, sticky embrace that can make traveling feel heavy and cumbersome, often leaving visitors yearning for refreshing breezes and shade.

December Average Humidity in Oakland

This chart illustrates the average monthly humidity levels in Oakland, 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 Oakland is approximately 84%, 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 Oakland

In Oakland 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 Oakland.

Maximum UV Index Levels in Oakland for December

The chart shows the monthly maximum UV Index (UVI) for Oakland 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 Oakland typically reaches 5, which falls under the moderate exposure category.

Data source: Oakland 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 Oakland Compares to Other Months

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

This table compares monthly weather conditions in Oakland, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	16°C (60°F)	43 mm (1.7 inches)	83%	moderate
February Weather	19°C (66°F)	54 mm (2.1 inches)	80%	very high
March Weather	20°C (68°F)	19 mm (0.8 inches)	75%	very high
April Weather	23°C (73°F)	75 mm (2.9 inches)	70%	extreme
May Weather	25°C (78°F)	105 mm (4.1 inches)	68%	extreme
June Weather	27°C (81°F)	213 mm (8.4 inches)	75%	extreme
July Weather	27°C (82°F)	243 mm (9.6 inches)	79%	extreme
August Weather	28°C (82°F)	233 mm (9.2 inches)	81%	extreme
September Weather	27°C (81°F)	183 mm (7.2 inches)	83%	extreme
October Weather	25°C (77°F)	84 mm (3.3 inches)	81%	very high
November Weather	20°C (68°F)	46 mm (1.8 inches)	82%	high
December Weather	17°C (63°F)	65 mm (2.6 inches)	84%	moderate