Jerseyville Weather Forecast

    • 59
    • 78

    Chance Rain Showers

    • 58
    • 78

    Partly Sunny

    • 62
    • 81

    Mostly Cloudy

    • 64
    • 78

    Rain Showers Likely

    • 64
    • 81

    Rain Showers Likely

    • 62
    • 83

    Chance Thunderstorms

    • 58
    • 78

    Chance Thunderstorms

Today 23 May Jersey

Partly sunny. Not as cool with Highs in the upper 70s. West Winds around 5 Mph.

Tonight 23 May Jersey

Mostly cloudy. Scattered Showers and Thunderstorms this Evening, then a chance of Showers with a slight chance of Thunderstorms after midnight. Lows in the upper 50s. Southwest Winds around 5 Mph. Chance of rain 50 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Jerseyville Temperature Statistics

May Temperature

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

  • Lowest 3 May, 2026

    40.6 °F

  • Average May

    63.4 °F

  • Highest 17 May, 2026

    87.1 °F

Climate (2021–Present)

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 °F

  • Average High 2021–2026

    68.9 °F
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