St Charles Weather Forecast

    • 32
    • 36

    Chance Snow

    • 46
    • 63

    Increasing Clouds

    • 44
    • 73

    Mostly Sunny

    • 51
    • 73

    Mostly Sunny

    • 57
    • 81

    Mostly Sunny

    • 41
    • 79

    Partly Sunny

    • 38
    • 55

    Mostly Cloudy

Today 17 Mar St. Charles

Partly sunny. Highs in the mid 30s. Southwest Winds around 5 Mph.

Tonight 17 Mar St. Charles

Cloudy. A chance of Snow, mainly this evening. Not as cool. Near steady temperature in the lower 30s. Southeast Winds 10 to 15 Mph. Gusts up to 30 Mph after midnight. Chance of snow 30 percent.

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St Charles Temperature Statistics

March Temperature

St. Louis Lambert International Airport (7.5 miles)

  • Lowest 1 March, 2026

    27 °F

  • Average March

    53 °F

  • Highest 10 March, 2026

    86 °F

Climate (2021–Present)

St. Louis Lambert International Airport (7.5 miles)

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  • Average Low 2021–2026

    50.5 °F

  • Average 2021–2026

    60 °F

  • Average High 2021–2026

    69.5 °F
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