Jerseyville Weather Forecast

    • 73
    • 93

    Mostly Sunny

    • 74
    • 95

    Mostly Sunny

    • 75
    • 96

    Hot

    • 74
    • 96

    Mostly Sunny

    • 74
    • 95

    Mostly Sunny

    • 73
    • 94

    Slight Chance Thunderstorms

Today 28 Jun Jersey

Mostly sunny. A slight chance of Showers and Thunderstorms in the morning. Patchy fog in the morning. Humid with Highs in the lower 90s. South Winds 5 to 10 Mph. Chance of rain 20 percent. Heat index Values up to 105 in the afternoon.

Tonight 28 Jun Jersey

Mostly cloudy with a chance of Showers and Thunderstorms. Patchy fog. Near steady temperature in the lower 70s. Southeast Winds around 5 Mph. Chance of rain 40 percent.

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  • Temperature Forecast NOAA

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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

    74.5 °F

  • Highest 17 June, 2026

    93.7 °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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