Jerseyville Weather Forecast

    • 56
    • 84

    Becoming Sunny

    • 53
    • 76

    Mostly Sunny

    • 51
    • 73

    Partly Sunny

    • 51
    • 74

    Mostly Sunny

    • 56
    • 76

    Mostly Sunny

    • 57
    • 77

    Partly Sunny

Today 23 Aug Jersey

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

Tonight 23 Aug Jersey

Partly cloudy. Near steady temperature in the mid 60s. Light and variable Winds.

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Jerseyville Temperature Statistics

August Temperature

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

  • Lowest 3 August, 2025

    58.6 °F

  • Average August

    79.4 °F

  • Highest 18 August, 2025

    98.7 °F

Climate (2020–Present)

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

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  • Average Low 2020–2025

    47.4 °F

  • Average 2020–2025

    57.7 °F

  • Average High 2020–2025

    68.4 °F
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