Machens Weather Forecast

    • 70
    • 98

    Slight Chance Thunderstorms

    • 66
    • 93

    Partly Sunny

    • 67
    • 93

    Partly Sunny

    • 66
    • 93

    Slight Chance Thunderstorms

    • 64
    • 89

    Chance Thunderstorms

    • 61
    • 87

    Chance Rain Showers

Today 14 Sep St. Charles

Mostly sunny. A slight chance of Showers and Thunderstorms in the afternoon. Hot with Highs in the upper 90s. Northwest Winds around 5 Mph. Chance of rain 20 percent.

Tonight 14 Sep St. Charles

Partly cloudy. A slight chance of Showers and Thunderstorms in the evening. Lows around 70. Northeast Winds around 5 Mph. Chance of rain 20 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Machens Temperature Statistics

September Temperature

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

  • Lowest 7 September, 2025

    48 °F

  • Average September

    66.8 °F

  • Highest 11 September, 2025

    89.1 °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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