Grass Island Weather Forecast

    • 67
    • 77

    Chance Rain Showers

    • 68
    • 76

    Chance Rain Showers

    • 67
    • 77

    Rain Showers Likely

    • 68
    • 75

    Chance Rain Showers

    • 66
    • 80

    Chance Rain Showers

    • 63
    • 78

    Chance Rain Showers

    • 61
    • 75

    Partly Sunny

Today 30 Aug Southern New Haven

Partly sunny. A slight chance of Showers this afternoon. Highs around 80. Southwest Winds 5 to 10 Mph. Gusts up to 20 Mph this afternoon. Chance of rain 20 percent.

Tonight 30 Aug Southern New Haven

Mostly cloudy. A chance of Showers and Thunderstorms this Evening, then a slight chance of Showers after midnight. Lows in the mid 60s. Southwest Winds 5 to 10 Mph, becoming northwest after midnight. Chance of rain 50 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Grass Island Temperature Statistics

August Temperature

Chester, Chester Airport (11.2 miles)

  • Lowest 25 August, 2026

    57.2 °F

  • Average August

    74.1 °F

  • Highest 7 August, 2026

    93.2 °F

Climate (2021–2026)

Chester, Chester Airport (11.2 miles)

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  • Average Low 2021–2026

    45.2 °F

  • Average 2021–2026

    53.6 °F

  • Average High 2021–2026

    62.6 °F
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