Groton Weather Forecast

    • 17
    • 27

    Chance Snow

    • 7
    • 23

    Partly Sunny

    • 11
    • 18

    Mostly Cloudy

    • 12
    • 26

    Mostly Cloudy

    • 17
    • 36

    Mostly Cloudy

    • 26
    • 37

    Chance Rain

    • 11
    • 38

    Mostly Cloudy

Today 13 Dec Southern Grafton

Cloudy with a 20 percent chance of snow Showers. Highs in the upper 20s. Light and variable Winds.

Tonight 13 Dec Southern Grafton

Cloudy. A chance of snow after midnight. Lows around 17. Light and variable Winds. Chance of snow 40 percent.

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Groton Temperature Statistics

December Temperature

Plymouth Municipal Airport (6.2 miles)

  • Lowest 9 December, 2025

    -11 °F

  • Average December

    19.6 °F

  • Highest 1 December, 2025

    36.5 °F

Climate (2020–Present)

Plymouth Municipal Airport (6.2 miles)

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  • Average Low 2020–2025

    36.6 °F

  • Average 2020–2025

    46.7 °F

  • Average High 2020–2025

    57.1 °F
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