Jerseyville Weather Forecast

    • 67
    • 84

    Chance Thunderstorms

    • 65
    • 84

    Slight Chance Thunderstorms

    • 67
    • 86

    Mostly Sunny

    • 68
    • 88

    Mostly Sunny

Today 11 Jul Jersey

Mostly cloudy. Scattered Showers and Thunderstorms in the Morning, then numerous Showers and Thunderstorms in the afternoon. Highs in the lower 80s. Southeast Winds around 5 Mph, becoming northeast around 5 Mph in the afternoon. Chance of rain 60 percent.

Tonight 11 Jul Jersey

Mostly cloudy. A chance of Showers and Thunderstorms, mainly in the evening. Lows in the upper 60s. Northeast Winds around 5 Mph. Chance of rain 50 percent.

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Jerseyville Temperature Statistics

July Temperature

St. Charles, St. Charles County Smartt Airport (13.7 miles)

  • Lowest 5 July, 2026

    69.7 °F

  • Average July

    82.1 °F

  • Highest 2 July, 2026

    97.6 °F

Climate (2021–2026)

St. Charles, St. Charles County Smartt Airport (13.7 miles)

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  • Average Low 2021–2026

    47.3 °F

  • Average 2021–2026

    58 °F

  • Average High 2021–2026

    68.9 °F
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