Watertown Weather Forecast

    • 26
    • 37

    Gradual Clearing

    • 20
    • 38

    Mostly Cloudy

    • 10
    • 26

    Mostly Sunny

    • 28
    • 34

    Slight Chance Snow

    • 32
    • 44

    Chance Rain

    • 26
    • 41

    Chance Snow

Today 6 Dec Southeast Middlesex

Mostly cloudy. A slight chance of snow Showers. Not as cool with Highs in the upper 30s. Southwest Winds around 5 Mph. Chance of snow 20 percent.

Tonight 6 Dec Southeast Middlesex

Mostly cloudy in the Evening, then becoming partly cloudy. Lows in the mid 20s. West Winds around 5 Mph.

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Watertown Temperature Statistics

December Temperature

Laurence G Hanscom Field Airport (8.7 miles)

  • Lowest 4 December, 2025

    15.1 °F

  • Average December

    30.8 °F

  • Highest 1 December, 2025

    42.1 °F

Climate (2020–Present)

Laurence G Hanscom Field Airport (8.7 miles)

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  • Average Low 2020–2025

    41.6 °F

  • Average 2020–2025

    51.9 °F

  • Average High 2020–2025

    61.9 °F
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