Lake St Louis Weather Forecast

    • 46
    • 69

    Becoming Sunny

    • 52
    • 76

    Mostly Sunny

    • 56
    • 83

    Rain Showers Likely

    • 50
    • 77

    Sunny

    • 58
    • 75

    Chance Rain Showers

    • 65
    • 85

    Chance Rain Showers

    • 65
    • 87

    Chance Thunderstorms

Today 10 May St. Charles

Mostly sunny and cooler. Near steady temperature in the upper 60s. North Winds 5 to 10 Mph.

Tonight 10 May St. Charles

Partly cloudy in the Evening, then clearing. Lows in the mid 40s. North Winds around 5 Mph in the Evening, becoming light and variable.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Lake St Louis Temperature Statistics

May Temperature

St. Louis, Spirit Of St. Louis Airport (10.6 miles)

  • Lowest 7 May, 2026

    36.6 °F

  • Average May

    56.4 °F

  • Highest 4 May, 2026

    81.6 °F

Climate (2021–Present)

St. Louis, Spirit Of St. Louis Airport (10.6 miles)

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  • Average Low 2021–2026

    46 °F

  • Average 2021–2026

    57.4 °F

  • Average High 2021–2026

    68.8 °F
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