Alton Weather Forecast

    • 46
    • 84

    Rain Showers

    • 44
    • 67

    Becoming Sunny

    • 49
    • 75

    Mostly Sunny

    • 54
    • 80

    Partly Sunny

    • 55
    • 82

    Mostly Sunny

    • 57
    • 83

    Partly Sunny

    • 61
    • 83

    Rain Showers Likely

Today 18 Apr Jefferson

Partly sunny with a chance of Showers with a slight chance of Thunderstorms. Near steady temperature in the lower 80s. Southwest Winds 5 to 10 Mph with Gusts up to 20 Mph. Chance of rain 40 percent.

Tonight 18 Apr Jefferson

Showers with a slight chance of Thunderstorms this Evening, then Showers likely after midnight. Much cooler with Lows in the upper 40s. Northwest Winds 10 to 15 Mph, becoming north 15 to 20 Mph after midnight. Chance of rain 90 percent.

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Alton Temperature Statistics

April Temperature

Birmingham, Birmingham International Airport (6.2 miles)

  • Lowest 6 April, 2026

    47.6 °F

  • Average April

    69.5 °F

  • Highest 16 April, 2026

    87.1 °F

Climate (2021–Present)

Birmingham, Birmingham International Airport (6.2 miles)

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  • Average Low 2021–2026

    55.5 °F

  • Average 2021–2026

    65.4 °F

  • Average High 2021–2026

    75.9 °F
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