Grand Gulf Weather Forecast

    • 73
    • 93

    Chance Thunderstorms

    • 73
    • 92

    Chance Thunderstorms

    • 74
    • 95

    Slight Chance Thunderstorms

    • 73
    • 95

    Mostly Sunny

    • 73
    • 93

    Mostly Sunny

    • 73
    • 92

    Slight Chance Thunderstorms

Today 4 Sep Claiborne

Partly sunny with a chance of Showers and Thunderstorms. Near steady temperature around 90. East Winds around 5 Mph. Chance of rain 50 percent. Heat index Values up to 109.

Tonight 4 Sep Claiborne

Mostly cloudy with a chance of Showers and Thunderstorms in the Evening, then partly cloudy after midnight. Patchy fog after midnight. Humid with Lows in the lower 70s. South Winds around 5 Mph in the Evening, becoming light and variable. Chance of rain 50 percent.

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Grand Gulf Temperature Statistics

September Temperature

Vicksburg Municipal (14.9 miles)

  • Lowest 2 September, 2026

    73.4 °F

  • Average September

    83.9 °F

  • Highest 2 September, 2026

    96.8 °F

Climate (2021–2026)

Vicksburg Municipal (14.9 miles)

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  • Average Low 2021–2026

    56.7 °F

  • Average 2021–2026

    66.7 °F

  • Average High 2021–2026

    77.8 °F
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