Saint Charles Weather Forecast

    • 34
    • 55

    Mostly Cloudy

    • 40
    • 60

    Mostly Cloudy

    • 43
    • 52

    Chance Rain

    • 37
    • 58

    Mostly Sunny

    • 46
    • 62

    Mostly Cloudy

    • 53
    • 66

    Mostly Cloudy

Today 12 Feb St. Charles

Mostly cloudy this Morning, then becoming mostly sunny. Highs in the mid 50s. Southeast Winds 5 to 10 Mph.

Tonight 12 Feb St. Charles

Mostly cloudy in the Evening, then becoming partly cloudy. Lows in the lower 30s. Southeast Winds 5 to 10 Mph.

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Saint Charles Temperature Statistics

February Temperature

St. Louis Lambert International Airport (6.2 miles)

  • Lowest 1 February, 2026

    4.6 °F

  • Average February

    31.5 °F

  • Highest 9 February, 2026

    57 °F

Climate (2021–Present)

St. Louis Lambert International Airport (6.2 miles)

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  • Average Low 2021–2026

    50.4 °F

  • Average 2021–2026

    59.8 °F

  • Average High 2021–2026

    69.2 °F
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