Knight Island State Park Weather Forecast

    • 66
    • 81

    Mostly Sunny

    • 64
    • 76

    Rain Showers Likely

    • 61
    • 73

    Rain Showers Likely

    • 63
    • 72

    Rain Showers Likely

    • 65
    • 76

    Partly Sunny

    • 68
    • 78

    Chance Rain Showers

    • 65
    • 76

    Rain Showers Likely

Today 22 Aug Grand Isle

Sunny. Highs in the upper 70s. Light and variable Winds, becoming south around 10 Mph this afternoon.

Tonight 22 Aug Grand Isle

Mostly clear. Lows in the mid 60s. Southeast Winds 10 to 15 Mph.

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  • Temperature Real-Time

Knight Island State Park Temperature Statistics

August Temperature

Franklin County State Airport (11.8 miles)

  • Lowest 15 August, 2026

    52 °F

  • Average August

    72.8 °F

  • Highest 5 August, 2026

    88.2 °F

Climate (2021–2026)

Franklin County State Airport (11.8 miles)

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  • Average Low 2021–2026

    36.5 °F

  • Average 2021–2026

    45.6 °F

  • Average High 2021–2026

    54.3 °F
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