Saint Charles Weather Forecast

    • 53
    • 84

    Rain

    • 32
    • 68

    Rain

    • 47
    • 57

    Partly Sunny

    • 41
    • 64

    Partly Sunny

    • 49
    • 70

    Mostly Cloudy

    • 24
    • 62

    Chance Rain Showers

Today 10 Mar St. Charles

Mostly sunny. Highs in the lower 80s. South Winds 15 to 20 Mph with Gusts up to 30 Mph.

Tonight 10 Mar St. Charles

Mostly cloudy. A chance of Showers and Thunderstorms in the Evening, then Showers with Thunderstorms likely after midnight. Lows in the mid 50s. Southwest Winds 15 to 20 Mph with Gusts up to 30 Mph. Chance of rain 90 percent.

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Saint Charles Temperature Statistics

March Temperature

St. Louis Lambert International Airport (6.2 miles)

  • Lowest 1 March, 2026

    27 °F

  • Average March

    50 °F

  • Highest 6 March, 2026

    80.1 °F

Climate (2021–Present)

St. Louis Lambert International Airport (6.2 miles)

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  • Average Low 2021–2026

    50.6 °F

  • Average 2021–2026

    60 °F

  • Average High 2021–2026

    69.4 °F
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