Somerville Weather Forecast

    • 23
    • 49

    Rain

    • 21
    • 28

    Mostly Cloudy

    • 19
    • 34

    Mostly Cloudy

    • 15
    • 26

    Chance Snow

    • 18
    • 27

    Partly Sunny

    • 22
    • 33

    Mostly Cloudy

Today 29 Dec Southeast Middlesex

Partly sunny. Much Colder with Highs in the upper 20s. West Winds 15 to 20 Mph with Gusts up to 40 Mph.

Tonight 29 Dec Southeast Middlesex

Mostly cloudy. Lows around 20. Highs in the mid 30s.

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Somerville Temperature Statistics

December Temperature

Boston, Logan International Airport (4.3 miles)

  • Lowest 5 December, 2025

    12 °F

  • Average December

    32.2 °F

  • Highest 19 December, 2025

    59 °F

Climate (2020–Present)

Boston, Logan International Airport (4.3 miles)

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  • Average Low 2020–2025

    46.9 °F

  • Average 2020–2025

    53.7 °F

  • Average High 2020–2025

    61 °F
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