Jerseyville Weather Forecast

    • 64
    • 92

    Increasing Clouds

    • 62
    • 85

    Chance Thunderstorms

    • 64
    • 85

    Slight Chance Thunderstorms

    • 65
    • 85

    Chance Thunderstorms

    • 64
    • 83

    Chance Thunderstorms

    • 61
    • 83

    Slight Chance Thunderstorms

Today 18 Sep Jersey

Sunny. Highs in the lower 90s. Southeast Winds around 5 Mph.

Tonight 18 Sep Jersey

Partly cloudy in the Evening, then mostly cloudy with a slight chance of Showers and Thunderstorms after midnight. Lows in the mid 60s. Northeast Winds 5 to 10 Mph. Chance of rain 20 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Jerseyville Temperature Statistics

September Temperature

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

  • Lowest 7 September, 2025

    48 °F

  • Average September

    70.1 °F

  • Highest 14 September, 2025

    96.1 °F

Climate (2020–Present)

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

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  • Average Low 2020–2025

    47.3 °F

  • Average 2020–2025

    57.6 °F

  • Average High 2020–2025

    68.4 °F
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