Jerseyville Weather Forecast

    • 64
    • 85

    Slight Chance Thunderstorms

    • 66
    • 86

    Mostly Sunny

    • 69
    • 89

    Mostly Sunny

Today 12 Jul Jersey

Sunny. Highs in the mid 80s. Northeast Winds 10 to 15 Mph.

Tonight 12 Jul Jersey

Clear. Lows in the mid 60s. Northeast Winds 5 to 10 Mph.

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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

    81.7 °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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