December Weather in San Diego

Last updated: March 2, 2024

The weather in San Diego, Mexico, during December is characterized by an average temperature of 21°C (71°F). Highs can soar to 32°C (89°F), while lows may dip to 12°C (53°F). Typically, the humidity level in San Diego throughout December hovers around 76%.

12°C (53°F)

Minimum temperature

21°C (71°F)

Average temperature

32°C (89°F)

Maximum temperature

76%

Humidity

Precipitation and Sunshine hours

In December, San Diego averages 8 mm (0.3 inches) of rainfall, typically over the course of 2 rainy days. The month enjoys an average of 11 hours 11 minutes of daylight, with the sun shining for approximately 10 hours 12 minutes each day. Additionally, there is a 71% probability of sunny days during this period.

8 mm (0.3 inches)

Precipitation

2 rainy days

Rainy days

10 hours 12 minutes

Sunshine hours

71%

Chance of sun

UV Index

In December, the UV Index in San Diego reaches a maximum of 9, 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 9 9 6 4 2 1 0 0
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

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