Groton Weather Forecast

    • 25
    • 40

    Mostly Cloudy

    • 34
    • 49

    Increasing Clouds

    • 44
    • 56

    Chance Drizzle

    • 45
    • 59

    Rain

    • 28
    • 51

    Chance Rain Showers

    • 31
    • 49

    Partly Sunny

    • 36
    • 57

    Mostly Cloudy

Today 13 Mar Southern Grafton

Mostly cloudy. Highs around 40. Southeast Winds around 10 Mph.

Tonight 13 Mar Southern Grafton

Mostly cloudy this Evening, then becoming partly cloudy. Patchy fog after midnight. Lows in the mid 20s. Southeast Winds around 10 Mph with Gusts up to 20 Mph this Evening, becoming light and variable.

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Groton Temperature Statistics

March Temperature

Plymouth Municipal Airport (6.2 miles)

  • Lowest 3 March, 2025

    4.8 °F

  • Average March

    28.9 °F

  • Highest 11 March, 2025

    62.6 °F

Climate (2020–Present)

Plymouth Municipal Airport (6.2 miles)

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  • Average Low 2020–2025

    36.7 °F

  • Average 2020–2025

    46.7 °F

  • Average High 2020–2025

    57.1 °F
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