Jerseyville Weather Forecast

    • 49
    • 60

    Mostly Cloudy

    • 54
    • 60

    Mostly Cloudy

    • 46
    • 67

    Partly Sunny

    • 41
    • 67

    Mostly Cloudy

    • 17
    • 48

    Slight Chance Rain/Snow

    • 15
    • 25

    Partly Sunny

Today 24 Dec Jersey

Cloudy with patchy drizzle. Highs around 60. Southeast Winds 5 to 10 Mph.

Tonight 24 Dec Jersey

Mostly cloudy. Patchy fog after midnight. Lows in the upper 40s. South Winds around 5 Mph, becoming northwest after midnight.

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Jerseyville Temperature Statistics

December Temperature

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

  • Lowest 14 December, 2025

    6.1 °F

  • Average December

    31.4 °F

  • Highest 18 December, 2025

    57.9 °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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