Grand Isle State Park Weather Forecast

    • 82
    • 87

    Chance Thunderstorms

    • 82
    • 87

    Chance Thunderstorms

    • 83
    • 87

    Slight Chance Thunderstorms

    • 83
    • 88

    Mostly Sunny

    • 83
    • 88

    Mostly Sunny

    • 83
    • 88

    Mostly Sunny

Today 9 Aug Coastal Jefferson

Mostly sunny with a chance of Showers and Thunderstorms. Humid with Highs in the upper 80s. Northeast Winds around 5 Mph, becoming southeast around 5 Mph in the afternoon. Chance of rain 50 percent.

Tonight 9 Aug Coastal Jefferson

Partly cloudy. Near steady temperature around 80. Light and variable Winds.

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Grand Isle State Park Temperature Statistics

August Temperature

Port Fourchon (17.4 miles)

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  • Average August

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Climate (–)

Port Fourchon (17.4 miles)

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  • Average Low –

    71.6 °F

  • Average –

    72.5 °F

  • Average High –

    75.2 °F
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