Jerseyville Weather Forecast

    • 69
    • 89

    Mostly Sunny

    • 74
    • 92

    Mostly Sunny

    • 75
    • 94

    Slight Chance Thunderstorms

    • 72
    • 92

    Rain Showers Likely

    • 67
    • 87

    Chance Thunderstorms

    • 64
    • 81

    Chance Rain Showers

Today 8 Aug Jersey

Sunny. Highs in the upper 80s. Northwest Winds around 5 Mph.

Tonight 8 Aug Jersey

Mostly clear. Lows in the upper 60s. Southeast Winds around 5 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Jerseyville Temperature Statistics

August Temperature

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

  • Lowest 3 August, 2026

    63.6 °F

  • Average August

    75 °F

  • Highest 4 August, 2026

    88.6 °F

Climate (2021–2026)

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

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  • Average Low 2021–2026

    47.4 °F

  • Average 2021–2026

    58 °F

  • Average High 2021–2026

    69 °F
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