Jerseyville Weather Forecast

    • 68
    • 88

    Chance Thunderstorms

    • 75
    • 91

    Mostly Sunny

    • 66
    • 93

    Mostly Sunny

    • 62
    • 84

    Mostly Sunny

    • 63
    • 83

    Partly Sunny

    • 66
    • 84

    Slight Chance Thunderstorms

Today 19 Jul Jersey

Mostly sunny. A chance of Showers and Thunderstorms in the afternoon. Humid with Highs in the upper 80s. Northeast Winds 5 to 10 Mph. Chance of rain 50 percent.

Tonight 19 Jul Jersey

Mostly cloudy with a slight chance of Showers and Thunderstorms. Near steady temperature in the mid 70s. Light and variable Winds. Chance of rain 20 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 13 July, 2026

    65.6 °F

  • Average July

    80.6 °F

  • Highest 2 July, 2026

    97.6 °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

    69 °F
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