Groton Weather Forecast

    • 60
    • 90

    Partly Sunny

    • 63
    • 90

    Chance Rain Showers

    • 53
    • 78

    Rain Showers

    • 53
    • 76

    Partly Sunny

    • 59
    • 85

    Partly Sunny

    • 64
    • 90

    Partly Sunny

Today 5 Jun Northwest Middlesex County

Mostly sunny. Hot with Highs around 90. Northwest Winds 5 to 10 Mph.

Tonight 5 Jun Northwest Middlesex County

Mostly cloudy. Lows around 60. Southeast Winds around 5 Mph in the Evening, becoming light and variable.

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Groton Temperature Statistics

June Temperature

Fitchburg, Fitchburg Municipal Airport (9.9 miles)

  • Lowest 1 June, 2026

    43 °F

  • Average June

    61.3 °F

  • Highest 3 June, 2026

    84 °F

Climate (2021–Present)

Fitchburg, Fitchburg Municipal Airport (9.9 miles)

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  • Average Low 2021–2026

    41.4 °F

  • Average 2021–2026

    51.5 °F

  • Average High 2021–2026

    61.4 °F
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