St. Charles County Smartt Airport Weather Forecast

    • 63
    • 79

    Becoming Sunny

    • 43
    • 93

    Rain

    • 32
    • 54

    Slight Chance Rain

    • 41
    • 59

    Partly Sunny

    • 53
    • 66

    Slight Chance Thunderstorms

    • 60
    • 83

    Chance Rain

Today 25 Mar St. Charles

Mostly sunny. Not as cool with Highs in the upper 70s. South Winds 10 to 15 Mph.

Tonight 25 Mar St. Charles

Partly cloudy in the Evening, then becoming mostly clear. Not as cool with Lows in the lower 60s. South Winds around 10 Mph with Gusts up to 25 Mph.

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St. Charles County Smartt Airport Temperature Statistics

March Temperature

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

  • Lowest 17 March, 2026

    14.6 °F

  • Average March

    51.3 °F

  • Highest 20 March, 2026

    89.7 °F

Climate (2021–Present)

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

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  • Average Low 2021–2026

    47.3 °F

  • Average 2021–2026

    57.8 °F

  • Average High 2021–2026

    68.7 °F
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