January Weather in Oakland, United States

Last updated: June 24, 2025

In Oakland, United States, the average temperature in January hovers around 5°C (42°F), with fluctuations between a chilly -8°C (17°F) and a mild 18°C (64°F). Expect precipitation totaling 158 mm (6.2 in) over 16 days, contributing to a high average humidity of 84%.

January Temperature in Oakland

In January in Oakland, the average temperature is 5°C (42°F). The maximum can reach 18°C (64°F) while the minimum can drop as low as -8°C (17°F). Be sure to pack warm clothing for chilly days, but also bring layers for possible milder 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 5°C (42°F), with highs reaching up to 18°C (64°F) and lows dropping to around -8°C (17°F).
JanFebMarAprMayJunJulAugSepOctNovDec414145505662686963534640
Data source: Temperature data for Oakland generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

January Precipitation in Oakland

In Oakland in January, the total precipitation amount is 158 mm (6.2 in) that occurs over a span of 16 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 158 mm (6.2 inches) of precipitation spread over approximately 16 days.
JanFebMarAprMayJunJulAugSepOctNovDec1581991411316540267087135169
Data source: Precipitation data for January generated using information from the Copernicus Climate Change Service.
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January Humidity in Oakland

In Oakland in January, humidity is 84%. With an average temperature of 5°C (42°F), this humidity feels like a thick blanket wrapping around you, making every step feel heavier while traveling.

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 84%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec84%85%86%83%83%83%78%67%66%77%87%87%
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 2, which corresponds to a low exposure category. With this level of UV radiation, the time to burn is approximately 45 minutes. To learn more about the hourly UV index in Oakland, you can visit Hourly UV Index in Oakland.

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 2, which falls under the low exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec246710101098532
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.
 TemperaturePrecipitationHumidityUV
January Weather5°C (42°F)158 mm (6.2 inches)84%low
February Weather5°C (41°F)199 mm (7.8 inches)85%moderate
March Weather7°C (45°F)141 mm (5.6 inches)86%high
April Weather10°C (50°F)131 mm (5.2 inches)83%high
May Weather13°C (56°F)65 mm (2.5 inches)83%very high
June Weather17°C (63°F)40 mm (1.6 inches)83%very high
July Weather20°C (68°F)2 mm (0.1 inches)78%very high
August Weather20°C (69°F)6 mm (0.2 inches)67%very high
September Weather17°C (63°F)70 mm (2.8 inches)66%very high
October Weather11°C (53°F)87 mm (3.4 inches)77%moderate
November Weather8°C (46°F)135 mm (5.3 inches)87%moderate
December Weather4°C (40°F)169 mm (6.7 inches)87%low

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