Connecticut River - Lieutenant River Entrance Weather Forecast

    • 41
    • 49

    Rain

    • 26
    • 57

    Rain

    • 33
    • 42

    Mostly Cloudy

    • 22
    • 46

    Partly Sunny

    • 21
    • 34

    Partly Sunny

    • 29
    • 40

    Chance Rain/Snow

    • 25
    • 42

    Partly Sunny

Today 18 Dec Southern New London

Sunny. Highs in the upper 40s. Southeast Winds 5 to 10 Mph with Gusts up to 20 Mph.

Tonight 18 Dec Southern New London

Mostly cloudy. A slight chance of rain in the Evening, then rain after midnight. Not as cool with Lows in the lower 40s. Southeast Winds 5 to 10 Mph with Gusts up to 20 Mph, increasing to south 15 to 20 Mph with Gusts up to 35 Mph after midnight. Chance of rain 90 percent.

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Connecticut River - Lieutenant River Entrance Temperature Statistics

December Temperature

Chester, Chester Airport (9.3 miles)

  • Lowest 5 December, 2025

    10.4 °F

  • Average December

    29.6 °F

  • Highest 10 December, 2025

    48.2 °F

Climate (2020–Present)

Chester, Chester Airport (9.3 miles)

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  • Average Low 2020–2025

    45.2 °F

  • Average 2020–2025

    53.6 °F

  • Average High 2020–2025

    62.6 °F
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