Jerseyville Weather Forecast

    • 60
    • 84

    Mostly Sunny

    • 59
    • 82

    Partly Sunny

    • 62
    • 80

    Partly Sunny

    • 64
    • 83

    Partly Sunny

    • 64
    • 86

    Partly Sunny

    • 64
    • 86

    Partly Sunny

Today 22 Aug Jersey

Sunny. Highs in the mid 80s. Northwest Winds 5 to 10 Mph.

Tonight 22 Aug Jersey

Mostly clear. Lows around 60. Northwest Winds 5 to 10 Mph.

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Jerseyville Temperature Statistics

August Temperature

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

  • Lowest 18 August, 2026

    62.7 °F

  • Average August

    79 °F

  • Highest 13 August, 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

    47.4 °F

  • Average 2021–2026

    58.1 °F

  • Average High 2021–2026

    69 °F
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