Somerville Weather Forecast

    • 32
    • 38

    Mostly Cloudy

    • 23
    • 45

    Partly Sunny

    • 25
    • 34

    Partly Sunny

    • 30
    • 39

    Rain Likely

    • 24
    • 37

    Partly Sunny

    • 30
    • 39

    Chance Rain

    • 28
    • 41

    Chance Rain

Today 20 Dec Southeast Middlesex

Partly sunny and much cooler. Near steady temperature in the upper 30s. Southwest Winds 5 to 10 Mph.

Tonight 20 Dec Southeast Middlesex

Mostly cloudy. Lows in the lower 30s. South Winds 10 to 15 Mph with Gusts up to 30 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Somerville Temperature Statistics

December Temperature

Boston, Logan International Airport (4.3 miles)

  • Lowest 5 December, 2025

    12 °F

  • Average December

    31.7 °F

  • Highest 10 December, 2025

    48 °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

    53.8 °F

  • Average High 2020–2025

    61 °F
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