Jerseyville Weather Forecast

    • 62
    • 83

    Slight Chance Thunderstorms

    • 71
    • 85

    Partly Sunny

    • 68
    • 94

    Chance Thunderstorms

    • 71
    • 91

    Chance Rain Showers

    • 68
    • 91

    Chance Rain Showers

    • 62
    • 86

    Chance Rain Showers

Today 13 Sep Jersey

Mostly sunny. Highs in the lower 80s. North Winds 5 to 10 Mph.

Tonight 13 Sep Jersey

Mostly cloudy. A slight chance of Showers and Thunderstorms in the evening. Lows in the lower 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 8 September, 2026

    62.7 °F

  • Average September

    81.8 °F

  • Highest 2 September, 2026

    101.6 °F

Climate (2021–2026)

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

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  • Average Low 2021–2026

    47.4 °F

  • Average 2021–2026

    58.1 °F

  • Average High 2021–2026

    69 °F
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