Grass Island Weather Forecast

    • 57
    • 79

    Partly Sunny

    • 62
    • 67

    Partly Sunny

    • 62
    • 68

    Rain Showers

    • 58
    • 67

    Chance Rain Showers

    • 56
    • 62

    Chance Rain Showers

    • 56
    • 63

    Chance Rain Showers

Today 18 Sep Southern Fairfield

Partly sunny with a 30 percent chance of Showers. Highs in the upper 60s.

Tonight 18 Sep Southern Fairfield

Partly cloudy. Cooler with Lows in the lower 50s. North Winds 10 to 15 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Grass Island Temperature Statistics

September Temperature

White Plains - Westchester County Airport (8.7 miles)

  • Lowest 15 September, 2026

    51.1 °F

  • Average September

    68.6 °F

  • Highest 10 September, 2026

    84 °F

Climate (2021–2026)

White Plains - Westchester County Airport (8.7 miles)

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  • Average Low 2021–2026

    45.8 °F

  • Average 2021–2026

    54 °F

  • Average High 2021–2026

    62.3 °F
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