Alton Weather Forecast

    • 72
    • 90

    Increasing Clouds

    • 71
    • 85

    Rain Showers

    • 70
    • 86

    Chance Thunderstorms

    • 70
    • 85

    Chance Thunderstorms

    • 71
    • 87

    Chance Thunderstorms

    • 73
    • 89

    Chance Thunderstorms

Today 31 Jul Jefferson

Mostly sunny. A slight chance of Showers and Thunderstorms in the afternoon. Highs in the lower 90s. East Winds around 5 Mph, becoming west in the afternoon. Chance of rain 20 percent.

Tonight 31 Jul Jefferson

Partly cloudy. Lows in the lower 70s. East Winds around 5 Mph.

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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

    83.3 °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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