Cos Cob Harbor Weather Forecast

    • 70
    • 91

    Partly Sunny

    • 56
    • 89

    Rain Showers

    • 51
    • 68

    Mostly Cloudy

    • 49
    • 67

    Rain Showers Likely

    • 52
    • 61

    Rain Showers Likely

    • 54
    • 66

    Chance Rain Showers

Today 19 May Southern Fairfield

Mostly sunny. Highs in the lower 90s. Southwest Winds 10 to 15 Mph. Heat index Values in the mid 90s in the afternoon.

Tonight 19 May Southern Fairfield

Mostly cloudy with a slight chance of Showers and Thunderstorms in the Evening, then partly cloudy after midnight. Lows around 70. Southwest Winds 10 to 15 Mph. Chance of rain 20 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Cos Cob Harbor Temperature Statistics

May Temperature

White Plains - Westchester County Airport (6.2 miles)

  • Lowest 12 May, 2026

    41 °F

  • Average May

    55.6 °F

  • Highest 5 May, 2026

    75.9 °F

Climate (2021–Present)

White Plains - Westchester County Airport (6.2 miles)

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  • Average Low 2021–2026

    45.8 °F

  • Average 2021–2026

    54 °F

  • Average High 2021–2026

    62.2 °F
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