Alton Weather Forecast

    • 58
    • 81

    Rain Showers

    • 40
    • 61

    Rain Showers Likely

    • 40
    • 59

    Mostly Sunny

    • 36
    • 62

    Partly Sunny

    • 38
    • 56

    Partly Sunny

    • 51
    • 70

    Partly Sunny

Today 3 Apr Madison

Partly sunny. A slight chance of Showers and Thunderstorms this Morning, then a chance of Showers and Thunderstorms this afternoon. Highs in the lower 80s. South Winds 10 to 15 Mph with Gusts up to 25 Mph. Chance of rain 30 percent.

Tonight 3 Apr Madison

A chance of Thunderstorms. A chance of Showers in the Evening, then Showers after midnight. Lows in the upper 50s. South Winds 10 to 15 Mph with Gusts up to 25 Mph. Chance of rain near 100 percent.

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Alton Temperature Statistics

April Temperature

St. Louis Regional Airport (8.1 miles)

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Climate (2021–Present)

St. Louis Regional Airport (8.1 miles)

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  • Average Low 2021–2026

    46.3 °F

  • Average 2021–2026

    54.3 °F

  • Average High 2021–2026

    66.6 °F
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