May Weather in California

Last updated: March 2, 2024

The weather in California, United States, during May is characterized by an average temperature of 19°C (66°F). Highs can soar to 28°C (83°F), while lows may dip to 9°C (49°F). Typically, the humidity level in California throughout May hovers around 78%.

9°C (49°F)

Minimum temperature

19°C (66°F)

Average temperature

28°C (83°F)

Maximum temperature

78%

Humidity

Precipitation and Sunshine hours

In May, California averages 119 mm (4.7 inches) of rainfall, typically over the course of 12 rainy days. The month enjoys an average of 14 hours 14 minutes of daylight, with the sun shining for approximately 10 hours 4 minutes each day. Additionally, there is a 44% probability of sunny days during this period.

119 mm (4.7 inches)

Precipitation

12 rainy days

Rainy days

10 hours 4 minutes

Sunshine hours

44%

Chance of sun

UV Index

In May, the UV Index in California reaches a maximum of 10, indicating a level of VeryHigh exposure. The most intense UV radiation typically occurs between 12:00 and 14:00, during which unprotected skin may burn in as little as 15 minutes.

Average solar exposure data for the current time of the year. Actual values may vary and depend on many factors, such as cloud cover, vegetation cover, surface type, etc.
  07:00 08:00 09:00 10:00 11:00 12:00 13:00 14:00 15:00 16:00 17:00 18:00 19:00
UVI 1 2 4 6 8 10 10 9 7 5 3 2 1
Exposure Low Moderate High VeryHigh High Moderate Low
Time to burn 45 min 30 min 25 min 15 min 25 min 30 min 45 min

Compare California's Climate with Cities Worldwide