Cos Cob Harbor Weather Forecast

    • 32
    • 34

    Increasing Clouds

    • 33
    • 44

    Rain

    • 27
    • 39

    Partly Sunny

    • 26
    • 36

    Mostly Cloudy

    • 23
    • 37

    Partly Sunny

    • 20
    • 32

    Partly Sunny

Today 9 Dec Southern Fairfield

Mostly sunny. Highs in the mid 30s. North Winds around 5 Mph, becoming southwest this afternoon.

Tonight 9 Dec Southern Fairfield

Mostly cloudy. A slight chance of snow in the evening. Lows in the upper 20s. Southwest Winds 10 to 15 Mph. Chance of snow 20 percent.

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  • Temperature Real-Time

Cos Cob Harbor Temperature Statistics

December Temperature

White Plains - Westchester County Airport (6.2 miles)

  • Lowest 5 December, 2025

    14 °F

  • Average December

    32.2 °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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