December Weather in Riverside

Last updated: March 2, 2024

The weather in Riverside, United States, during December is characterized by an average temperature of 13°C (56°F). Highs can soar to 27°C (80°F), while lows may dip to -1°C (31°F). Typically, the humidity level in Riverside throughout December hovers around 87%.

-1°C (31°F)

Minimum temperature

13°C (56°F)

Average temperature

27°C (80°F)

Maximum temperature

87%

Humidity

Precipitation and Sunshine hours

In December, Riverside averages 116 mm (4.6 inches) of rainfall, typically over the course of 10 rainy days. The month enjoys an average of 10 hours 10 minutes of daylight, with the sun shining for approximately 6 hours 52 minutes each day. Additionally, there is a 34% probability of sunny days during this period.

116 mm (4.6 inches)

Precipitation

10 rainy days

Rainy days

6 hours 52 minutes

Sunshine hours

34%

Chance of sun

UV Index

In December, the UV Index in Riverside reaches a maximum of 4, indicating a level of Moderate exposure. The most intense UV radiation typically occurs between 11:00 and 13:00, during which unprotected skin may burn in as little as 30 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 1 2 3 4 4 4 3 2 1 1 0 0
Exposure Low Moderate Low
Time to burn 45 min 30 min 45 min

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