Machens Weather Forecast

    • 76
    • 92

    Thunderstorms

    • 77
    • 92

    Thunderstorms

    • 78
    • 96

    Mostly Sunny

    • 77
    • 97

    Hot

    • 71
    • 93

    Chance Thunderstorms

    • 65
    • 83

    Slight Chance Thunderstorms

    • 63
    • 80

    Partly Sunny

Today 26 Jul St. Charles

Mostly sunny with isolated Showers. Isolated Thunderstorms. Near steady temperature in the lower 90s. South Winds 5 to 10 Mph. Chance of rain 20 percent. Heat index Values up to 106.

Tonight 26 Jul St. Charles

Partly cloudy this Evening, then becoming mostly cloudy. Scattered Showers and Thunderstorms. Lows in the mid 70s. South Winds 5 to 10 Mph. Chance of rain 50 percent. Heat index Values up to 103 early this evening.

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Machens Temperature Statistics

July Temperature

St. Charles, St. Charles County Smartt Airport (5.6 miles)

  • Lowest 2 July, 2025

    65.6 °F

  • Average July

    80.8 °F

  • Highest 23 July, 2025

    96.7 °F

Climate (2020–Present)

St. Charles, St. Charles County Smartt Airport (5.6 miles)

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  • Average Low 2020–2025

    47.3 °F

  • Average 2020–2025

    57.6 °F

  • Average High 2020–2025

    68.3 °F
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