South Brother Weather Forecast

    • 58
    • 77

    Becoming Sunny

    • 57
    • 73

    Sunny

    • 61
    • 74

    Mostly Sunny

    • 64
    • 75

    Chance Rain Showers

    • 66
    • 82

    Slight Chance Thunderstorms

    • 65
    • 81

    Partly Sunny

Today 7 Jun Southern New London

Partly sunny with a 20 percent chance of Showers. Highs in the mid 80s. Northwest Winds around 10 Mph with Gusts up to 20 Mph.

Tonight 7 Jun Southern New London

Mostly cloudy in the Evening, then becoming partly cloudy. A 20 percent chance of Showers. Lows in the upper 50s. North Winds 5 to 10 Mph with Gusts up to 20 Mph.

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South Brother Temperature Statistics

June Temperature

Groton / New London, Groton / New London Airport (9.9 miles)

  • Lowest 2 June, 2026

    42.1 °F

  • Average June

    60.4 °F

  • Highest 5 June, 2026

    80.1 °F

Climate (2021–Present)

Groton / New London, Groton / New London Airport (9.9 miles)

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  • Average Low 2021–2026

    45.3 °F

  • Average 2021–2026

    53.2 °F

  • Average High 2021–2026

    60.7 °F
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