Cos Cob Harbor Weather Forecast

    • 30
    • 41

    Gradual Clearing

    • 26
    • 40

    Mostly Cloudy

    • 19
    • 31

    Partly Sunny

    • 32
    • 35

    Mostly Cloudy

    • 37
    • 45

    Chance Rain

    • 30
    • 42

    Chance Rain

Today 6 Dec Southern Fairfield

Mostly cloudy. A chance of light snow and freezing drizzle this morning. Highs around 40. Northwest Winds around 5 Mph, becoming west this afternoon. Chance of precipitation 30 percent.

Tonight 6 Dec Southern Fairfield

Partly cloudy in the Evening, then becoming mostly clear. Lows in the mid 20s. Northwest Winds 5 to 10 Mph.

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Cos Cob Harbor Temperature Statistics

December Temperature

White Plains - Westchester County Airport (6.2 miles)

  • Lowest 1 December, 2025

    27 °F

  • Average December

    34.6 °F

  • Highest 1 December, 2025

    43 °F

Climate (2020–Present)

White Plains - Westchester County Airport (6.2 miles)

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  • Average Low 2020–2025

    45.9 °F

  • Average 2020–2025

    54.1 °F

  • Average High 2020–2025

    62.3 °F
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