St. Charles County Smartt Airport Weather Forecast

    • 34
    • 55

    Becoming Sunny

    • 54
    • 61

    Rain Showers

    • 48
    • 76

    Thunderstorms

    • 47
    • 62

    Rain Likely

    • 46
    • 63

    Rain

    • 40
    • 56

    Rain Likely

Today 31 Mar St. Charles

Cloudy late this Morning, then becoming partly sunny. Much cooler with Highs in the mid 50s. Northwest Winds 10 to 15 Mph.

Tonight 31 Mar St. Charles

Mostly clear. Lows in the mid 30s. North Winds 5 to 10 Mph, becoming northeast after midnight.

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St. Charles County Smartt Airport Temperature Statistics

March Temperature

St. Charles, St. Charles County Smartt Airport (0 miles)

  • Lowest 2 March, 2025

    19.9 °F

  • Average March

    51.6 °F

  • Highest 14 March, 2025

    85.6 °F

Climate (2020–Present)

St. Charles, St. Charles County Smartt Airport (0 miles)

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  • Average Low 2020–2025

    47.3 °F

  • Average 2020–2025

    57.5 °F

  • Average High 2020–2025

    68.3 °F
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