Millstone Weather Forecast

    • 28
    • 40

    Partly Sunny

    • 40
    • 42

    Partly Sunny

    • 44
    • 52

    Mostly Cloudy

    • 50
    • 55

    Chance Rain

    • 42
    • 58

    Chance Rain

    • 36
    • 46

    Chance Rain

Today 28 Mar Southern New London

Partly sunny. A slight chance of snow Showers this morning. Highs in the lower 40s. North Winds 5 to 10 Mph with Gusts up to 30 Mph. Chance of snow 20 percent.

Tonight 28 Mar Southern New London

Mostly clear. Lows in the mid 20s. Northwest Winds 5 to 10 Mph. Gusts up to 30 Mph in the evening.

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Millstone Temperature Statistics

March Temperature

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

  • Lowest 3 March, 2026

    12 °F

  • Average March

    38.7 °F

  • Highest 9 March, 2026

    63 °F

Climate (2021–Present)

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

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  • Average Low 2021–2026

    45.3 °F

  • Average 2021–2026

    53.2 °F

  • Average High 2021–2026

    60.8 °F
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