Groton Weather Forecast

    • 57
    • 83

    Mostly Cloudy

    • 58
    • 76

    Rain Showers Likely

    • 49
    • 74

    Rain Showers

    • 49
    • 76

    Mostly Sunny

    • 55
    • 83

    Mostly Sunny

    • 61
    • 86

    Partly Sunny

Today 5 Jun Southern Grafton

Partly sunny. Highs in the mid 80s. Light and variable Winds.

Tonight 5 Jun Southern Grafton

Mostly cloudy in the Evening, then becoming partly cloudy. Lows in the upper 50s. Light and variable Winds.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Groton Temperature Statistics

June Temperature

Plymouth Municipal Airport (6.2 miles)

  • Lowest 2 June, 2026

    36 °F

  • Average June

    58.1 °F

  • Highest 3 June, 2026

    81.7 °F

Climate (2021–Present)

Plymouth Municipal Airport (6.2 miles)

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  • Average Low 2021–2026

    36.3 °F

  • Average 2021–2026

    46.3 °F

  • Average High 2021–2026

    56.9 °F
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