Low and Slow Airport Weather Forecast

    • 77
    • 91

    Slight Chance Thunderstorms

    • 77
    • 95

    Mostly Sunny

    • 74
    • 95

    Partly Sunny

    • 75
    • 91

    Chance Thunderstorms

    • 75
    • 91

    Chance Thunderstorms

    • 75
    • 92

    Mostly Sunny

Today 22 Jul Calhoun

Mostly cloudy. A slight chance of Showers and Thunderstorms this afternoon. Highs in the lower 90s. Southeast Winds around 5 Mph. Chance of rain 20 percent. Heat index Values up to 108.

Tonight 22 Jul Calhoun

Partly cloudy. A slight chance of Showers and Thunderstorms in the evening. Humid with Lows in the upper 70s. Southeast Winds around 5 Mph. Chance of rain 20 percent. Heat index Values up to 105 early in the evening.

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Low and Slow Airport Temperature Statistics

July Temperature

St. Charles, St. Charles County Smartt Airport (17.4 miles)

  • Lowest 2 July, 2025

    65.6 °F

  • Average July

    80.1 °F

  • Highest 16 July, 2025

    94.6 °F

Climate (2020–Present)

St. Charles, St. Charles County Smartt Airport (17.4 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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