Grand Isle State Park Weather Forecast

    • 53
    • 70

    Rain Showers

    • 50
    • 60

    Partly Sunny

    • 61
    • 67

    Rain Showers

    • 61
    • 70

    Rain Showers

    • 58
    • 67

    Rain Showers Likely

    • 60
    • 66

    Chance Rain Showers

    • 57
    • 69

    Partly Sunny

Today 1 Dec Coastal Jefferson

Cloudy. A chance of Showers with a slight chance of Thunderstorms. Near steady temperature in the mid 60s. Northeast Winds 10 to 15 Mph with Gusts up to 25 Mph. Chance of rain 40 percent.

Tonight 1 Dec Coastal Jefferson

A slight chance of Thunderstorms. Showers. Lows in the upper 40s. Northeast Winds 5 to 10 Mph, increasing to north 15 to 20 Mph after midnight. Chance of rain 90 percent.

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Grand Isle State Park Temperature Statistics

December Temperature

Port Fourchon (17.4 miles)

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  • Average December

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Climate (–Present)

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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