December Weather in San Bernardino

Last updated: March 2, 2024

The weather in San Bernardino, Italy, during December is characterized by an average temperature of 6°C (44°F). Highs can soar to 15°C (60°F), while lows may dip to -2°C (29°F). Typically, the humidity level in San Bernardino throughout December hovers around 85%.

-2°C (29°F)

Minimum temperature

6°C (44°F)

Average temperature

15°C (60°F)

Maximum temperature

85%

Humidity

Precipitation and Sunshine hours

In December, San Bernardino averages 63 mm (2.5 inches) of rainfall, typically over the course of 10 rainy days. The month enjoys an average of 8 hours 53 minutes of daylight, with the sun shining for approximately 7 hours 8 minutes each day. Additionally, there is a 42% probability of sunny days during this period.

63 mm (2.5 inches)

Precipitation

10 rainy days

Rainy days

7 hours 8 minutes

Sunshine hours

42%

Chance of sun

UV Index

In December, the UV Index in San Bernardino reaches a maximum of 2, indicating a level of Low exposure. The most intense UV radiation typically occurs between 11:00 and 13:00, during which unprotected skin may burn in as little as 45 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 0 1 1 1 2 2 2 1 1 1 0 0 0
Exposure Low
Time to burn 45 min

Compare San Bernardino's Climate with Cities Worldwide