Groton Weather Forecast

    • 62
    • 68

    Rain Showers Likely

    • 66
    • 78

    Rain Showers Likely

    • 65
    • 93

    Chance Thunderstorms

    • 59
    • 81

    Mostly Sunny

    • 66
    • 85

    Slight Chance Thunderstorms

    • 69
    • 88

    Mostly Cloudy

    • 71
    • 95

    Partly Sunny

Today 17 Jun Northwest Middlesex County

Cloudy with a 40 percent chance of Showers. Patchy fog. Near steady temperature in the upper 60s. Southeast Winds around 5 Mph.

Tonight 17 Jun Northwest Middlesex County

Cloudy. Showers Likely, mainly this evening. Patchy fog. Lows in the lower 60s. South Winds around 5 Mph. Chance of rain 70 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Groton Temperature Statistics

June Temperature

Fitchburg, Fitchburg Municipal Airport (9.9 miles)

  • Lowest 2 June, 2025

    41.6 °F

  • Average June

    65.3 °F

  • Highest 5 June, 2025

    94.6 °F

Climate (2020–Present)

Fitchburg, Fitchburg Municipal Airport (9.9 miles)

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  • Average Low 2020–2025

    41.9 °F

  • Average 2020–2025

    51.9 °F

  • Average High 2020–2025

    61.8 °F
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