Alton Weather Forecast

    • 51
    • 69

    Chance Rain Showers

    • 47
    • 63

    Rain Showers Likely

    • 47
    • 61

    Chance Rain Showers

    • 48
    • 66

    Partly Sunny

    • 57
    • 75

    Chance Rain Showers

    • 56
    • 75

    Chance Rain Showers

Today 2 May Madison

Mostly cloudy with a 50 percent chance of Showers. Highs in the upper 60s. Northwest Winds around 5 Mph, becoming south in the afternoon.

Tonight 2 May Madison

Mostly cloudy with a 50 percent chance of Showers. Lows around 50. Northwest Winds around 5 Mph.

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Alton Temperature Statistics

May Temperature

St. Louis Regional Airport (8.1 miles)

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  • Average May

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Climate (2020–Present)

St. Louis Regional Airport (8.1 miles)

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  • Average Low 2020–2025

    45.9 °F

  • Average 2020–2025

    53.8 °F

  • Average High 2020–2025

    65.9 °F
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