December Weather in Somerville

Last updated: March 2, 2024

The weather in Somerville, United States, during December is characterized by an average temperature of -2°C (28°F). Highs can soar to 14°C (57°F), while lows may dip to -17°C (2°F). Typically, the humidity level in Somerville throughout December hovers around 84%.

-17°C (2°F)

Minimum temperature

-2°C (28°F)

Average temperature

14°C (57°F)

Maximum temperature

84%

Humidity

Precipitation and Sunshine hours

In December, Somerville averages 121 mm (4.8 inches) of rainfall, typically over the course of 11 rainy days. The month enjoys an average of 8 hours 53 minutes of daylight, with the sun shining for approximately 5 hours 36 minutes each day. Additionally, there is a 37% probability of sunny days during this period.

121 mm (4.8 inches)

Precipitation

11 rainy days

Rainy days

5 hours 36 minutes

Sunshine hours

37%

Chance of sun

UV Index

In December, the UV Index in Somerville reaches a maximum of 2, indicating a level of Low exposure. The most intense UV radiation typically occurs between 10:00 and 12:00, 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 1 1 1 2 2 2 2 1 1 0 0 0 0
Exposure Low
Time to burn 45 min

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