Alton Weather Forecast

    • 70
    • 89

    Mostly Sunny

    • 70
    • 91

    Mostly Sunny

    • 71
    • 93

    Mostly Sunny

    • 71
    • 92

    Chance Thunderstorms

    • 71
    • 90

    Chance Thunderstorms

    • 70
    • 90

    Chance Rain Showers

Today 8 Sep Jefferson

Sunny. Highs in the lower 90s. Southeast Winds 5 to 10 Mph.

Tonight 8 Sep Jefferson

Mostly clear. Lows in the lower 70s. East Winds 5 to 10 Mph.

Graph Plots Open in Graphs

  • Temperature Forecast NOAA

  • Temperature Real-Time

Alton Temperature Statistics

September Temperature

Birmingham, Birmingham International Airport (6.2 miles)

  • Lowest 1 September, 2026

    73.7 °F

  • Average September

    87.5 °F

  • Highest 4 September, 2026

    102.7 °F

Climate (2021–2026)

Birmingham, Birmingham International Airport (6.2 miles)

Take a look at our website widgetsAvailable free! Find Out More

  • Average Low 2021–2026

    55.6 °F

  • Average 2021–2026

    65.7 °F

  • Average High 2021–2026

    76.3 °F
Get WillyWeather+ to remove ads