Grass Island Weather Forecast

    • 54
    • 63

    Chance Rain Showers

    • 47
    • 70

    Rain Showers Likely

    • 40
    • 53

    Partly Sunny

    • 44
    • 56

    Mostly Sunny

    • 47
    • 61

    Partly Sunny

    • 47
    • 64

    Partly Sunny

Today 15 Oct Southern New Haven

Sunny, cooler with Highs in the lower 60s. North Winds 5 to 10 Mph.

Tonight 15 Oct Southern New Haven

Partly cloudy in the Evening, then cloudy with a slight chance of Showers after midnight. Lows in the upper 40s. Southeast Winds 5 to 10 Mph with Gusts up to 20 Mph. Chance of rain 20 percent.

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Grass Island Temperature Statistics

October Temperature

Chester, Chester Airport (11.2 miles)

  • Lowest 7 October, 2026

    37.4 °F

  • Average October

    59.2 °F

  • Highest 2 October, 2026

    80.6 °F

Climate (2021–2026)

Chester, Chester Airport (11.2 miles)

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  • Average Low 2021–2026

    45.1 °F

  • Average 2021–2026

    53.5 °F

  • Average High 2021–2026

    62.5 °F
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