Knight Island State Park Weather Forecast

    • 57
    • 70

    Mostly Sunny

    • 67
    • 76

    Mostly Sunny

    • 72
    • 87

    Chance Thunderstorms

    • 65
    • 78

    Rain Showers

    • 65
    • 79

    Slight Chance Thunderstorms

    • 68
    • 80

    Chance Rain Showers

    • 68
    • 82

    Slight Chance Thunderstorms

Today 22 Jul Grand Isle

Mostly sunny. Highs in the lower 70s. Light and variable Winds.

Tonight 22 Jul Grand Isle

Mostly clear. Lows in the mid 50s. Light and variable Winds.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Knight Island State Park Temperature Statistics

July Temperature

Franklin County State Airport (11.8 miles)

  • Lowest 19 July, 2025

    54.1 °F

  • Average July

    74.7 °F

  • Highest 16 July, 2025

    92.5 °F

Climate (2020–Present)

Franklin County State Airport (11.8 miles)

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  • Average Low 2020–2025

    37.2 °F

  • Average 2020–2025

    46.3 °F

  • Average High 2020–2025

    55.2 °F
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