Jerseyville Weather Forecast

    • 39
    • 66

    Sunny

    • 41
    • 70

    Mostly Sunny

    • 44
    • 74

    Mostly Sunny

    • 46
    • 76

    Mostly Sunny

    • 48
    • 77

    Mostly Sunny

    • 48
    • 76

    Mostly Sunny

Today 18 Oct Jersey

Sunny. Not as cool with Highs in the upper 60s. South Winds 5 to 10 Mph.

Tonight 18 Oct Jersey

Clear. Lows in the upper 30s. Southeast Winds around 5 Mph.

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Jerseyville Temperature Statistics

October Temperature

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

  • Lowest 4 October, 2026

    44.7 °F

  • Average October

    67.9 °F

  • Highest 12 October, 2026

    93.7 °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

    58.1 °F

  • Average High 2021–2026

    69 °F
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