Jerseyville Weather Forecast

    • 73
    • 94

    Chance Thunderstorms

    • 71
    • 93

    Chance Thunderstorms

    • 68
    • 88

    Chance Thunderstorms

    • 66
    • 86

    Slight Chance Thunderstorms

    • 66
    • 86

    Mostly Sunny

    • 69
    • 90

    Slight Chance Thunderstorms

    • 70
    • 92

    Chance Thunderstorms

Today 3 Jul Jersey

Mostly sunny with a chance of Showers and Thunderstorms. Near steady temperature in the lower 90s. Southwest Winds 5 to 10 Mph. Chance of rain 40 percent. Heat index Values up to 105.

Tonight 3 Jul Jersey

Partly cloudy with a chance of Showers and Thunderstorms. Lows in the lower 70s. South Winds around 5 Mph. Chance of rain 30 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Jerseyville Temperature Statistics

July Temperature

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

  • Lowest 1 July, 2026

    73.9 °F

  • Average July

    84.6 °F

  • Highest 1 July, 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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