January Weather in Oakland, United States

Last updated: June 24, 2025

In January, the average temperature in Oakland, United States hovers around -2°C (29°F). However, temperatures can dip as low as -27°C (-17°F), while highs can reach up to 19°C (66°F). Expect around 98 mm (3.8 in) of precipitation over approximately 14 days, contributing to an average humidity of 86%.

January Temperature in Oakland

In January in Oakland, the average temperature is -2°C (29°F). Maximums can reach 19°C (66°F), and minimums can be as low as -27°C (-17°F). Be prepared for a wide range of temperatures while traveling, and pack accordingly for both chilly and mild weather.

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

The chart illustrates January 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, January typically has an average temperature of -2°C (29°F), with highs reaching up to 19°C (66°F) and lows dropping to around -27°C (-17°F).

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

January Precipitation in Oakland

In Oakland in January, the precipitation amount is 98 mm (3.8 in) over the course of 14 days.

January Precipitation Trends in Oakland

The chart displays monthly precipitation patterns in Oakland, with values for each month alongside January’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how January’s conditions compare to those of other months. In Oakland, January typically receives around 98 mm (3.8 inches) of precipitation spread over approximately 14 days.

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

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Millimeters (mm) Inches (in)

January Humidity in Oakland

In Oakland in January humidity is 86%. With an average temperature of -2°C (29°F), this humidity feels like a damp chill that seeps through layers of clothing, making outdoor activities uncomfortable and travel plans challenging.

January Average Humidity in Oakland

This chart illustrates the average monthly humidity levels in Oakland, with January’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In January, average humidity in Oakland is approximately 86%, offering insight into how humid the weather typically is during this month.

Data source: Humidity data for January generated using information from the Copernicus Climate Change Service.

January UV Index in Oakland

In Oakland in January, 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 Oakland, you can check the information here.

Maximum UV Index Levels in Oakland for January

The chart shows the monthly maximum UV Index (UVI) for Oakland in January, 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 January, the maximum UV index in Oakland typically reaches 3, which falls under the moderate exposure category.

Data source: Oakland January 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 January 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 January’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 January’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-2°C (29°F)	98 mm (3.8 inches)	86%	moderate
February Weather	1°C (34°F)	153 mm (6.0 inches)	86%	moderate
March Weather	4°C (39°F)	124 mm (4.9 inches)	86%	high
April Weather	9°C (49°F)	156 mm (6.1 inches)	84%	very high
May Weather	15°C (59°F)	171 mm (6.7 inches)	78%	very high
June Weather	19°C (66°F)	152 mm (6.0 inches)	79%	very high
July Weather	21°C (71°F)	116 mm (4.6 inches)	70%	very high
August Weather	20°C (69°F)	114 mm (4.5 inches)	59%	very high
September Weather	18°C (64°F)	120 mm (4.7 inches)	68%	very high
October Weather	12°C (54°F)	118 mm (4.7 inches)	80%	high
November Weather	4°C (40°F)	92 mm (3.6 inches)	86%	moderate
December Weather	1°C (34°F)	131 mm (5.2 inches)	85%	moderate