Alton Weather Forecast

    • 76
    • 95

    Increasing Clouds

    • 69
    • 90

    Chance Thunderstorms

    • 67
    • 89

    Mostly Sunny

    • 70
    • 89

    Partly Sunny

    • 70
    • 86

    Thunderstorms Likely

    • 70
    • 86

    Thunderstorms Likely

Today 28 Jul Jefferson

Sunny with Highs in the mid 90s. West Winds 5 to 10 Mph. Heat index Values up to 108.

Tonight 28 Jul Jefferson

Mostly clear in the Evening, then becoming partly cloudy. Lows in the upper 70s. West Winds around 5 Mph. Heat index Values up to 105 early in the evening.

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Alton Temperature Statistics

July Temperature

Birmingham, Birmingham International Airport (6.2 miles)

  • Lowest 18 July, 2026

    71.7 °F

  • Average July

    82.9 °F

  • Highest 1 July, 2026

    96.7 °F

Climate (2021–2026)

Birmingham, Birmingham International Airport (6.2 miles)

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  • Average Low 2021–2026

    55.6 °F

  • Average 2021–2026

    65.6 °F

  • Average High 2021–2026

    76.1 °F
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