Haley Farm State Park Weather Forecast

    • 61
    • 71

    Rain Showers Likely

    • 59
    • 74

    Partly Sunny

    • 52
    • 78

    Mostly Sunny

    • 50
    • 69

    Mostly Sunny

    • 53
    • 67

    Partly Sunny

    • 58
    • 71

    Partly Sunny

    • 60
    • 75

    Partly Sunny

Today 17 Sep Southern New London

Mostly cloudy with a chance of Showers with a slight chance of Thunderstorms. Highs in the lower 70s. East Winds around 10 Mph with Gusts up to 20 Mph. Chance of rain 50 percent.

Tonight 17 Sep Southern New London

Mostly cloudy. Showers likely with a slight chance of Thunderstorms in the Evening, then a chance of Showers after midnight. Patchy fog. Lows in the lower 60s. Northeast Winds 5 to 10 Mph. Gusts up to 20 Mph in the evening. Chance of rain 60 percent.

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Haley Farm State Park Temperature Statistics

September Temperature

Groton / New London, Groton / New London Airport (1.9 miles)

  • Lowest 9 September, 2025

    48 °F

  • Average September

    61.9 °F

  • Highest 6 September, 2025

    75.9 °F

Climate (2020–Present)

Groton / New London, Groton / New London Airport (1.9 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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