Groton Weather Forecast

    • 35
    • 54

    Increasing Clouds

    • 31
    • 54

    Mostly Sunny

    • 28
    • 48

    Mostly Sunny

    • 32
    • 53

    Sunny

    • 39
    • 59

    Mostly Sunny

    • 39
    • 60

    Partly Sunny

Today 21 Oct Southern Grafton

Mostly sunny. Highs in the mid 50s. Light and variable Winds.

Tonight 21 Oct Southern Grafton

Partly cloudy. Lows in the mid 30s. Light and variable Winds, becoming northwest around 10 Mph with Gusts up to 20 Mph after midnight.

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Groton Temperature Statistics

October Temperature

Plymouth Municipal Airport (6.2 miles)

  • Lowest 18 October, 2026

    21.9 °F

  • Average October

    48.5 °F

  • Highest 2 October, 2026

    78.4 °F

Climate (2021–2026)

Plymouth Municipal Airport (6.2 miles)

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  • Average Low 2021–2026

    36 °F

  • Average 2021–2026

    46.2 °F

  • Average High 2021–2026

    56.9 °F
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