St Charles Weather Forecast

    • 65
    • 81

    Mostly Cloudy

    • 54
    • 82

    Slight Chance Thunderstorms

    • 51
    • 73

    Mostly Sunny

    • 50
    • 69

    Mostly Sunny

    • 49
    • 71

    Mostly Sunny

    • 53
    • 75

    Mostly Sunny

Today 22 Aug Kane

Partly cloudy late morning through mid Afternoon, then becoming mostly cloudy. Highs in the lower 80s. Southwest Winds around 5 Mph.

Tonight 22 Aug Kane

Mostly cloudy. A slight chance of Showers late. Lows in the mid 60s. Southwest Winds around 5 Mph. Chance of precipitation 20 percent.

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St Charles Temperature Statistics

August Temperature

Chicago / West Chicago, Dupage Airport (3.1 miles)

  • Lowest 2 August, 2025

    54.6 °F

  • Average August

    76.2 °F

  • Highest 16 August, 2025

    95.6 °F

Climate (2020–Present)

Chicago / West Chicago, Dupage Airport (3.1 miles)

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  • Average Low 2020–2025

    42.1 °F

  • Average 2020–2025

    51.8 °F

  • Average High 2020–2025

    61.3 °F
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