Alton Weather Forecast

    • 75
    • 96

    Mostly Sunny

    • 76
    • 97

    Hot

    • 75
    • 99

    Hot

    • 74
    • 95

    Slight Chance Thunderstorms

    • 74
    • 94

    Slight Chance Thunderstorms

    • 73
    • 94

    Chance Thunderstorms

Today 15 Aug Jefferson

Sunny, hot with Highs in the upper 90s. West Winds around 5 Mph. Heat index Values up to 108.

Tonight 15 Aug Jefferson

Mostly clear. Near steady temperature in the upper 70s. Light and variable Winds.

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  • Temperature Real-Time

Alton Temperature Statistics

August Temperature

Birmingham, Birmingham International Airport (6.2 miles)

  • Lowest 4 August, 2026

    70.6 °F

  • Average August

    82.4 °F

  • Highest 10 August, 2026

    95.6 °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

    76.2 °F
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