Alton Weather Forecast

    • 64
    • 89

    Mostly Sunny

    • 67
    • 89

    Partly Sunny

    • 68
    • 89

    Chance Rain Showers

    • 67
    • 84

    Rain Showers Likely

    • 62
    • 77

    Rain Showers

    • 57
    • 77

    Chance Rain Showers

Today 30 Sep Jefferson

Sunny. Highs around 90. Southeast Winds around 5 Mph.

Tonight 30 Sep Jefferson

Clear. Lows in the mid 60s. Southeast Winds around 5 Mph.

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Alton Temperature Statistics

September Temperature

Birmingham, Birmingham International Airport (6.2 miles)

  • Lowest 27 September, 2026

    54 °F

  • Average September

    83.4 °F

  • Highest 4 September, 2026

    102.7 °F

Climate (2021–2026)

Birmingham, Birmingham International Airport (6.2 miles)

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  • Average Low 2021–2026

    55.7 °F

  • Average 2021–2026

    65.8 °F

  • Average High 2021–2026

    76.4 °F
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