Groton Weather Forecast

    • 34
    • 61

    Sunny

    • 41
    • 64

    Mostly Sunny

    • 50
    • 69

    Rain Showers Likely

    • 45
    • 63

    Rain Showers Likely

    • 46
    • 65

    Chance Rain Showers

    • 42
    • 60

    Chance Rain Showers

Today 17 Oct Northwest Middlesex County

Sunny. Highs in the lower 60s. North Winds 5 to 10 Mph with Gusts up to 20 Mph.

Tonight 17 Oct Northwest Middlesex County

Mostly clear. Near steady temperature around 40. North Winds 5 to 10 Mph with Gusts up to 20 Mph.

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Groton Temperature Statistics

October Temperature

Fitchburg, Fitchburg Municipal Airport (9.9 miles)

  • Lowest 10 October, 2025

    27 °F

  • Average October

    56.1 °F

  • Highest 5 October, 2025

    84.9 °F

Climate (2020–Present)

Fitchburg, Fitchburg Municipal Airport (9.9 miles)

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  • Average Low 2020–2025

    41.8 °F

  • Average 2020–2025

    51.9 °F

  • Average High 2020–2025

    61.8 °F
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