Knight Island State Park Weather Forecast

    • 67
    • 81

    Increasing Clouds

    • 65
    • 79

    Rain Showers

    • 61
    • 77

    Chance Thunderstorms

    • 61
    • 76

    Mostly Sunny

    • 63
    • 79

    Partly Sunny

    • 65
    • 80

    Chance Rain Showers

Today 8 Jul Grand Isle

Mostly sunny. Highs in the mid 80s. South Winds around 10 Mph in the Morning, becoming light and variable.

Tonight 8 Jul Grand Isle

Mostly clear until Midnight, then becoming partly cloudy. Humid with Lows in the upper 60s. South Winds 10 to 15 Mph.

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Knight Island State Park Temperature Statistics

July Temperature

Franklin County State Airport (11.8 miles)

  • Lowest 1 July, 2026

    84 °F

  • Average July

    84 °F

  • Highest 1 July, 2026

    84 °F

Climate (2021–2026)

Franklin County State Airport (11.8 miles)

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  • Average Low 2021–2026

    36.8 °F

  • Average 2021–2026

    45.9 °F

  • Average High 2021–2026

    54.7 °F
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