Jerseyville Weather Forecast

    • 53
    • 73

    Decreasing Clouds

    • 53
    • 76

    Mostly Sunny

    • 62
    • 82

    Mostly Cloudy

    • 69
    • 82

    Rain Showers Likely

    • 60
    • 81

    Rain Showers Likely

    • 54
    • 69

    Chance Rain Showers

    • 54
    • 69

    Slight Chance Rain Showers

Today 27 Sep Jersey

Mostly sunny with a 20 percent chance of Showers. Highs around 70.

Tonight 27 Sep Jersey

Mostly cloudy. Lows in the lower 50s. Northeast Winds around 5 Mph.

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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 25 September, 2026

    55.9 °F

  • Average September

    78.5 °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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