Bay St Louis Weather Forecast

    • 77
    • 90

    Mostly Sunny

    • 75
    • 88

    Slight Chance Thunderstorms

    • 74
    • 85

    Partly Sunny

    • 74
    • 86

    Mostly Cloudy

    • 74
    • 87

    Partly Sunny

    • 75
    • 87

    Slight Chance Thunderstorms

Today 23 Sep Southern Hancock

Sunny. Highs in the lower 90s. Northeast Winds 5 to 10 Mph.

Tonight 23 Sep Southern Hancock

Mostly clear. Lows in the lower 70s. East Winds around 5 Mph, becoming north after midnight.

Graph Plots Open in Graphs

  • Temperature Forecast NOAA

  • Temperature Real-Time

Bay St Louis Temperature Statistics

September Temperature

Bay St. Louis, Stennis International Airport (8.7 miles)

  • Lowest 18 September, 2026

    68 °F

  • Average September

    84.1 °F

  • Highest 14 September, 2026

    95 °F

Climate (2021–2026)

Bay St. Louis, Stennis International Airport (8.7 miles)

Take a look at our website widgetsAvailable free! Find Out More

  • Average Low 2021–2026

    60.4 °F

  • Average 2021–2026

    71.8 °F

  • Average High 2021–2026

    78.6 °F
Get WillyWeather+ to remove ads