May Weather in San Francisco

Last updated: March 2, 2024

The weather in San Francisco, Mexico, during May is characterized by an average temperature of 28°C (82°F). Highs can soar to 34°C (93°F), while lows may dip to 20°C (68°F). Typically, the humidity level in San Francisco throughout May hovers around 68%.

20°C (68°F)

Minimum temperature

28°C (82°F)

Average temperature

34°C (93°F)

Maximum temperature

68%

Humidity

Precipitation and Sunshine hours

In May, San Francisco averages 89 mm (3.5 inches) of rainfall, typically over the course of 14 rainy days. The month enjoys an average of 13 hours 7 minutes of daylight, with the sun shining for approximately 11 hours 0 minutes each day. Additionally, there is a 47% probability of sunny days during this period.

89 mm (3.5 inches)

Precipitation

14 rainy days

Rainy days

11 hours 0 minutes

Sunshine hours

47%

Chance of sun

UV Index

In May, the UV Index in San Francisco reaches a maximum of 13, indicating a level of Extreme exposure. The most intense UV radiation typically occurs between 12:00 and 14:00, during which unprotected skin may burn in as little as 10 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 7 11 13 13 12 9 5 3 1 1
Exposure Low Moderate High Extreme VeryHigh Moderate Low
Time to burn 45 min 30 min 25 min 10 min 15 min 30 min 45 min

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