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May Weather in Oakland, United States

Last updated: June 24, 2025

In May, the average temperature in Oakland, United States hovers around 15°C (59°F). Expect a wide range of temperatures, with minimums dipping to -4°C (25°F) and maximums soaring up to 28°C (82°F). You'll also encounter 171 mm (6.7 in) of precipitation spread across approximately 19 days, contributing to an average humidity level of 78%.

May Temperature in Oakland

In May in Oakland, the average temperature is 15°C (59°F), with maximums reaching up to 28°C (82°F) and minimums dropping as low as -4°C (25°F). Travelers should be prepared for a wide range of temperatures and pack accordingly for both warm days and chilly nights.

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

The chart illustrates May 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, May typically has an average temperature of 15°C (59°F), with highs reaching up to 28°C (82°F) and lows dropping to around -4°C (25°F).
JanFebMarAprMayJunJulAugSepOctNovDec293439495966716964544034
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.

May Precipitation in Oakland

In Oakland in May, the total precipitation amount is 171 mm (6.7 in), distributed over a span of 19 days.

May Precipitation Trends in Oakland

The chart displays monthly precipitation patterns in Oakland, with values for each month alongside May’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how May’s conditions compare to those of other months. In Oakland, May typically receives around 171 mm (6.7 inches) of precipitation spread over approximately 19 days.
JanFebMarAprMayJunJulAugSepOctNovDec9815312415617115211611412011892131
Data source: Precipitation data for May generated using information from the Copernicus Climate Change Service.
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May Humidity in Oakland

In Oakland in May, humidity is 78%. With an average temperature of 15°C (59°F), this humidity feels like a warm, enveloping blanket that clings to your skin, making outdoor activities a bit more tiring and requiring frequent breaks for hydration as you explore the area.

May Average Humidity in Oakland

This chart illustrates the average monthly humidity levels in Oakland, with May’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In May, average humidity in Oakland is approximately 78%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec86%86%86%84%78%79%70%59%68%80%87%85%
Data source: Humidity data for May generated using information from the Copernicus Climate Change Service.

May UV Index in Oakland

In Oakland in May, the maximum UV index reaches 10, which corresponds to a very high Exposure Category. With a time to burn of just 15 minutes, it's crucial to take precautions. For more detailed information, you can check the Hourly UV Index in Oakland.

Maximum UV Index Levels in Oakland for May

The chart shows the monthly maximum UV Index (UVI) for Oakland in May, 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 May, the maximum UV index in Oakland typically reaches 10, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec3579101010108753
Data source: Oakland May 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 May 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 May’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 May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-2°C (29°F)98 mm (3.8 inches)86%moderate
February Weather1°C (34°F)153 mm (6.0 inches)86%moderate
March Weather4°C (39°F)124 mm (4.9 inches)86%high
April Weather9°C (49°F)156 mm (6.1 inches)84%very high
May Weather15°C (59°F)171 mm (6.7 inches)78%very high
June Weather19°C (66°F)152 mm (6.0 inches)79%very high
July Weather21°C (71°F)116 mm (4.6 inches)70%very high
August Weather20°C (69°F)114 mm (4.5 inches)59%very high
September Weather18°C (64°F)120 mm (4.7 inches)68%very high
October Weather12°C (54°F)118 mm (4.7 inches)80%high
November Weather4°C (40°F)92 mm (3.6 inches)86%moderate
December Weather1°C (34°F)131 mm (5.2 inches)85%moderate

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