Groton Weather Forecast

    • 5
    • 22

    Sunny

    • 22
    • 31

    Chance Snow

    • 18
    • 41

    Partly Sunny

    • 0
    • 28

    Partly Sunny

    • 1
    • 12

    Slight Chance Snow

    • 5
    • 14

    Chance Snow

    • 8
    • 21

    Chance Snow

Today 20 Jan Northwest Middlesex County

Mostly sunny. Colder with Highs in the lower 20s. West Winds 10 to 15 Mph with Gusts up to 25 Mph.

Tonight 20 Jan Northwest Middlesex County

Mostly clear. Cold with Lows around 5 above. Southwest Winds around 5 Mph. Gusts up to 25 Mph this evening.

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Groton Temperature Statistics

January Temperature

Fitchburg, Fitchburg Municipal Airport (9.9 miles)

  • Lowest 5 January, 2026

    3.9 °F

  • Average January

    29.3 °F

  • Highest 9 January, 2026

    50 °F

Climate (2021–Present)

Fitchburg, Fitchburg Municipal Airport (9.9 miles)

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  • Average Low 2021–2026

    41.6 °F

  • Average 2021–2026

    51.7 °F

  • Average High 2021–2026

    61.6 °F
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