Saint Charles Weather Forecast

    • 41
    • 59

    Mostly Sunny

    • 38
    • 62

    Partly Sunny

    • 43
    • 54

    Mostly Cloudy

    • 55
    • 75

    Partly Sunny

    • 56
    • 77

    Chance Rain Showers

    • 57
    • 78

    Chance Rain Showers

Today 5 Apr St. Charles

Sunny. Highs in the upper 50s. Northwest Winds 10 to 15 Mph.

Tonight 5 Apr St. Charles

Clear. Lows around 40. West Winds 5 to 10 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Saint Charles Temperature Statistics

April Temperature

St. Louis Lambert International Airport (6.2 miles)

  • Lowest 1 April, 2026

    48.7 °F

  • Average April

    67.7 °F

  • Highest 3 April, 2026

    82.9 °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

    69.6 °F
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