St Charles Weather Forecast

    • 18
    • 39

    Rain/Snow

    • 29
    • 34

    Partly Sunny

    • 19
    • 43

    Slight Chance Snow

    • 10
    • 26

    Partly Sunny

    • 16
    • 26

    Partly Sunny

    • 14
    • 30

    Mostly Sunny

Today 14 Jan St. Charles

Partly sunny. Much cooler with Highs in the upper 30s. Temperature falling into the lower 30s this afternoon. Northwest Winds 15 to 20 Mph with Gusts up to 35 Mph.

Tonight 14 Jan St. Charles

Clear. Much cooler with Lows around 18. Northwest Winds 10 to 15 Mph. Gusts up to 30 Mph in the evening.

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St Charles Temperature Statistics

January Temperature

St. Louis Lambert International Airport (7.5 miles)

  • Lowest 4 January, 2026

    23 °F

  • Average January

    41.8 °F

  • Highest 6 January, 2026

    66.9 °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

    59.9 °F

  • Average High 2021–2026

    69.3 °F
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