December Weather in Somerville

Last updated: March 2, 2024

The weather in Somerville, United States, during December is characterized by an average temperature of 13°C (56°F). Highs can soar to 27°C (81°F), while lows may dip to -1°C (31°F). Typically, the humidity level in Somerville throughout December hovers around 87%.

-1°C (31°F)

Minimum temperature

13°C (56°F)

Average temperature

27°C (81°F)

Maximum temperature

87%

Humidity

Precipitation and Sunshine hours

In December, Somerville averages 103 mm (4.0 inches) of rainfall, typically over the course of 8 rainy days. The month enjoys an average of 10 hours 13 minutes of daylight, with the sun shining for approximately 7 hours 6 minutes each day. Additionally, there is a 36% probability of sunny days during this period.

103 mm (4.0 inches)

Precipitation

8 rainy days

Rainy days

7 hours 6 minutes

Sunshine hours

36%

Chance of sun

UV Index

In December, the UV Index in Somerville reaches a maximum of 5, indicating a level of Moderate exposure. The most intense UV radiation typically occurs between 12:00 and 14:00, 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 0 1 2 3 4 5 4 3 2 1 1 0 0
Exposure Low Moderate Low
Time to burn 45 min 30 min 45 min

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