Grass Island Weather Forecast

    • 65
    • 78

    Sunny

    • 59
    • 80

    Mostly Sunny

    • 56
    • 69

    Mostly Sunny

    • 56
    • 70

    Partly Sunny

    • 63
    • 74

    Partly Sunny

    • 65
    • 81

    Slight Chance Rain Showers

    • 63
    • 79

    Slight Chance Rain Showers

Today 18 Sep Southern Fairfield

Sunny. Highs around 80. West Winds around 5 Mph.

Tonight 18 Sep Southern Fairfield

Clear. Lows around 60. West Winds around 5 Mph, becoming northwest after midnight.

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Grass Island Temperature Statistics

September Temperature

White Plains - Westchester County Airport (8.7 miles)

  • Lowest 8 September, 2025

    48.9 °F

  • Average September

    66.3 °F

  • Highest 6 September, 2025

    82 °F

Climate (2020–Present)

White Plains - Westchester County Airport (8.7 miles)

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  • Average Low 2020–2025

    45.9 °F

  • Average 2020–2025

    54.1 °F

  • Average High 2020–2025

    62.4 °F
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