Lake Saint Louis Weather Forecast

    • 71
    • 89

    Thunderstorms Likely

    • 69
    • 87

    Slight Chance Thunderstorms

    • 71
    • 89

    Chance Thunderstorms

    • 70
    • 88

    Chance Thunderstorms

    • 71
    • 89

    Chance Thunderstorms

    • 71
    • 92

    Chance Thunderstorms

    • 68
    • 88

    Chance Rain Showers

Today 6 Jul St. Charles

Showers and Thunderstorms likely. Near steady temperature in the upper 80s. West Winds 5 to 10 Mph. Chance of rain 70 percent. Heat index Values up to 102.

Tonight 6 Jul St. Charles

Mostly cloudy. Showers and Thunderstorms Likely, mainly in the evening. Humid with Lows in the lower 70s. West Winds 5 to 10 Mph. Chance of rain 70 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Lake Saint Louis Temperature Statistics

July Temperature

St. Louis, Spirit Of St. Louis Airport (11.2 miles)

  • Lowest 2 July, 2025

    62.1 °F

  • Average July

    78.2 °F

  • Highest 4 July, 2025

    91.9 °F

Climate (2020–Present)

St. Louis, Spirit Of St. Louis Airport (11.2 miles)

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  • Average Low 2020–2025

    45.8 °F

  • Average 2020–2025

    56.8 °F

  • Average High 2020–2025

    68 °F
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