Jerseyville Weather Forecast

    • 59
    • 81

    Thunderstorms

    • 57
    • 75

    Slight Chance Thunderstorms

    • 60
    • 79

    Mostly Sunny

    • 59
    • 82

    Partly Sunny

    • 59
    • 80

    Slight Chance Thunderstorms

    • 63
    • 82

    Chance Thunderstorms

Today 21 Jun Jersey

A chance of Showers and Thunderstorms in the Morning, then Showers and Thunderstorms in the afternoon. Some Thunderstorms may produce heavy rainfall. Highs around 80. Southeast Winds 10 to 15 Mph, becoming south in the afternoon. Gusts up to 30 Mph. Chance of rain near 100 percent.

Tonight 21 Jun Jersey

Mostly cloudy. Showers and Thunderstorms, mainly in the evening. Some Thunderstorms may produce heavy rainfall. Lows in the upper 50s. West Winds 10 to 15 Mph with Gusts up to 25 Mph, becoming northwest 5 to 10 Mph after midnight. Chance of rain 90 percent.

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Jerseyville Temperature Statistics

June Temperature

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

  • Lowest 16 June, 2026

    55.7 °F

  • Average June

    75.5 °F

  • Highest 17 June, 2026

    93 °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 °F

  • Average High 2021–2026

    68.9 °F
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