St Charles Weather Forecast

    • 78
    • 88

    Slight Chance Thunderstorms

    • 76
    • 96

    Slight Chance Thunderstorms

    • 77
    • 97

    Hot

    • 75
    • 97

    Chance Thunderstorms

    • 74
    • 93

    Slight Chance Thunderstorms

    • 71
    • 93

    Slight Chance Thunderstorms

    • 70
    • 92

    Mostly Sunny

Today 30 Aug Madison

Partly sunny with a slight chance of Showers and Thunderstorms. Highs in the mid 90s. South Winds 10 to 15 Mph with Gusts up to 25 Mph. Chance of rain 20 percent. Heat index Values up to 101.

Tonight 30 Aug Madison

Partly cloudy this Evening, then becoming mostly cloudy. Lows in the upper 70s. South Winds 10 to 15 Mph with Gusts up to 25 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

St Charles Temperature Statistics

August Temperature

Osceola Municipal Airport (17.4 miles)

  • Lowest 23 August, 2026

    55.8 °F

  • Average August

    73.9 °F

  • Highest 11 August, 2026

    91.4 °F

Climate (2021–2026)

Osceola Municipal Airport (17.4 miles)

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  • Average Low 2021–2026

    42.8 °F

  • Average 2021–2026

    53.1 °F

  • Average High 2021–2026

    63.9 °F
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