Saint Charles Weather Forecast

    • 60
    • 81

    Mostly Sunny

    • 54
    • 84

    Rain

    • 34
    • 68

    Rain

    • 46
    • 56

    Partly Sunny

    • 40
    • 65

    Partly Sunny

    • 50
    • 68

    Mostly Cloudy

Today 9 Mar St. Charles

Mostly sunny. Not as cool with Highs in the upper 70s. South Winds 10 to 15 Mph with Gusts up to 25 Mph.

Tonight 9 Mar St. Charles

Partly cloudy in the Evening, then clearing. Not as cool with Lows around 60. South Winds 10 to 15 Mph.

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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

    49.2 °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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