Jerseyville Aviation Inc. Airport Weather Forecast

    • 72
    • 93

    Slight Chance Thunderstorms

    • 69
    • 89

    Chance Thunderstorms

    • 75
    • 92

    Partly Sunny

    • 67
    • 93

    Mostly Sunny

    • 62
    • 84

    Mostly Sunny

    • 64
    • 83

    Chance Thunderstorms

    • 67
    • 84

    Slight Chance Thunderstorms

Today 18 Jul Jersey

Sunny with a slight chance of Showers and Thunderstorms. Near steady temperature in the lower 90s. West Winds around 10 Mph with Gusts up to 20 Mph. Chance of rain 20 percent. Heat index Values up to 103.

Tonight 18 Jul Jersey

Partly cloudy. A chance of Showers and Thunderstorms, mainly this evening. Lows in the lower 70s. West Winds 5 to 10 Mph, becoming north after midnight. Chance of rain 40 percent.

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Jerseyville Aviation Inc. Airport Temperature Statistics

July Temperature

St. Charles, St. Charles County Smartt Airport (12.4 miles)

  • Lowest 13 July, 2026

    65.6 °F

  • Average July

    80.6 °F

  • Highest 2 July, 2026

    97.6 °F

Climate (2021–2026)

St. Charles, St. Charles County Smartt Airport (12.4 miles)

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  • Average Low 2021–2026

    47.3 °F

  • Average 2021–2026

    58 °F

  • Average High 2021–2026

    69 °F
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