Fort Trumbull Weather Forecast

    • 60
    • 73

    Rain Showers Likely

    • 60
    • 77

    Chance Rain Showers

    • 51
    • 80

    Mostly Sunny

    • 50
    • 70

    Mostly Sunny

    • 53
    • 69

    Partly Sunny

    • 58
    • 74

    Partly Sunny

Today 17 Sep Southern New London

Partly sunny with a 50 percent chance of Showers. Highs in the lower 70s. East Winds 5 to 10 Mph. Gusts up to 20 Mph in the afternoon.

Tonight 17 Sep Southern New London

Showers likely with a slight chance of Thunderstorms. Lows in the upper 50s. Northeast Winds 5 to 10 Mph. Chance of rain 70 percent.

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Fort Trumbull Temperature Statistics

September Temperature

Groton / New London, Groton / New London Airport (2.5 miles)

  • Lowest 9 September, 2025

    48 °F

  • Average September

    61.8 °F

  • Highest 6 September, 2025

    75.9 °F

Climate (2020–Present)

Groton / New London, Groton / New London Airport (2.5 miles)

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  • Average Low 2020–2025

    45.7 °F

  • Average 2020–2025

    53.6 °F

  • Average High 2020–2025

    61.1 °F
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