Saint Charles Weather Forecast

    • 51
    • 78

    Partly Sunny

    • 58
    • 79

    Mostly Sunny

    • 56
    • 80

    Thunderstorms

    • 36
    • 67

    Mostly Cloudy

    • 34
    • 50

    Mostly Sunny

    • 50
    • 66

    Mostly Sunny

Today 12 Mar St. Charles

Mostly sunny. Highs in the upper 70s. South Winds around 5 Mph.

Tonight 12 Mar St. Charles

Mostly cloudy in the Evening, then becoming partly cloudy. Not as cool with Lows around 50. East Winds around 5 Mph.

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Saint Charles Temperature Statistics

March Temperature

St. Louis Lambert International Airport (6.2 miles)

  • Lowest 2 March, 2025

    24.9 °F

  • Average March

    46.9 °F

  • Highest 10 March, 2025

    75 °F

Climate (2020–Present)

St. Louis Lambert International Airport (6.2 miles)

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  • Average Low 2020–2025

    50.2 °F

  • Average 2020–2025

    59.4 °F

  • Average High 2020–2025

    68.8 °F
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