Geismar Weather Forecast

    • 74
    • 91

    Rain Showers

    • 75
    • 90

    Thunderstorms

    • 75
    • 90

    Rain Showers

    • 75
    • 91

    Thunderstorms Likely

    • 75
    • 91

    Thunderstorms Likely

    • 75
    • 93

    Thunderstorms Likely

Today 15 Jun Western Ascension

Partly sunny. A chance of Thunderstorms with a slight chance of Showers this Morning, then Showers with Thunderstorms likely this afternoon. Highs around 90. South Winds around 5 Mph. Chance of rain 80 percent.

Tonight 15 Jun Western Ascension

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

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Geismar Temperature Statistics

June Temperature

Baton Rouge, Baton Rouge Metropolitan, Ryan Field (23 miles)

  • Lowest 1 June, 2025

    63.6 °F

  • Average June

    81.4 °F

  • Highest 8 June, 2025

    94.6 °F

Climate (2020–Present)

Baton Rouge, Baton Rouge Metropolitan, Ryan Field (23 miles)

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  • Average Low 2020–2025

    60.4 °F

  • Average 2020–2025

    70.2 °F

  • Average High 2020–2025

    80.8 °F
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