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December Weather in Oakland, United States

Last updated: June 24, 2025

In December, the average temperature in Oakland, United States hovers around 9°C (49°F). Expect a temperature range with minimums dropping to -5°C (23°F) and highs reaching up to 25°C (77°F). Rainfall is moderate, with 63 mm (2.5 in) falling over about 7 days, and the air remains notably humid, boasting an average humidity of 87%.

December Temperature in Oakland

In December in Oakland, the average temperature is 9°C (49°F). The maximum can reach 25°C (77°F) and the minimum can be as low as -5°C (23°F). Pack for a range of temperatures to ensure a comfortable and enjoyable travel experience.

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 9°C (49°F), with highs reaching up to 25°C (77°F) and lows dropping to around -5°C (23°F).
JanFebMarAprMayJunJulAugSepOctNovDec444657637280848377655449
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.

December Precipitation in Oakland

In Oakland in December, the precipitation amount is 63 mm (2.5 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 63 mm (2.5 inches) of precipitation spread over approximately 7 days.
JanFebMarAprMayJunJulAugSepOctNovDec64931061081351075596981545663
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Oakland

In Oakland in December humidity is 87%. With an average temperature of 9°C (49°F), this humidity feels like a damp blanket wrapping around you, making travel uncomfortable and leaving you yearning for a dry breeze to refresh your spirit.

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 87%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec80%79%78%78%81%78%73%66%65%72%82%87%
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 4, which corresponds to a moderate Exposure Category. With a time to burn of 30 minutes, it’s important to take precautions to protect your skin. You can find more details in the Hourly UV Index in Oakland for better planning.

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 4, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec468101111111010864
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.
 TemperaturePrecipitationHumidityUV
January Weather7°C (44°F)64 mm (2.5 inches)80%moderate
February Weather8°C (46°F)93 mm (3.7 inches)79%high
March Weather14°C (58°F)106 mm (4.2 inches)78%very high
April Weather17°C (63°F)108 mm (4.3 inches)78%very high
May Weather22°C (73°F)134 mm (5.3 inches)81%extreme
June Weather27°C (80°F)107 mm (4.2 inches)78%extreme
July Weather29°C (84°F)55 mm (2.2 inches)73%extreme
August Weather28°C (83°F)96 mm (3.8 inches)66%very high
September Weather25°C (78°F)98 mm (3.9 inches)65%very high
October Weather19°C (66°F)154 mm (6.1 inches)72%very high
November Weather12°C (54°F)56 mm (2.2 inches)82%high
December Weather9°C (49°F)63 mm (2.5 inches)87%moderate

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