Millstone Weather Forecast

    • 65
    • 78

    Mostly Sunny

    • 64
    • 76

    Partly Sunny

    • 65
    • 75

    Mostly Cloudy

    • 63
    • 72

    Partly Sunny

    • 64
    • 73

    Mostly Sunny

    • 67
    • 75

    Partly Sunny

Today 4 Aug Southern New London

Sunny, hazy. Highs in the mid 80s. West Winds around 5 Mph, becoming south around 5 Mph in the afternoon.

Tonight 4 Aug Southern New London

Mostly clear. Near steady temperature around 60. Light and variable Winds.

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Millstone Temperature Statistics

August Temperature

Groton / New London, Groton / New London Airport (6.2 miles)

  • Lowest 1 August, 2025

    63 °F

  • Average August

    68.2 °F

  • Highest 1 August, 2025

    75 °F

Climate (2020–Present)

Groton / New London, Groton / New London Airport (6.2 miles)

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  • Average Low 2020–2025

    45.8 °F

  • Average 2020–2025

    53.6 °F

  • Average High 2020–2025

    61.1 °F
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