Alton Weather Forecast

    • 60
    • 82

    Mostly Cloudy

    • 53
    • 77

    Chance Thunderstorms

    • 53
    • 78

    Mostly Sunny

    • 56
    • 80

    Mostly Sunny

    • 52
    • 78

    Mostly Sunny

    • 57
    • 81

    Mostly Sunny

Today 10 May Jefferson

Widespread dense fog in the morning. Partly sunny. Highs in the lower 80s. Light and variable Winds.

Tonight 10 May Jefferson

Mostly cloudy. Widespread dense fog. Near steady temperature in the lower 60s. Light and variable Winds.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Alton Temperature Statistics

May Temperature

Birmingham, Birmingham International Airport (6.2 miles)

  • Lowest 3 May, 2026

    41.6 °F

  • Average May

    63.7 °F

  • Highest 4 May, 2026

    80.7 °F

Climate (2021–Present)

Birmingham, Birmingham International Airport (6.2 miles)

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  • Average Low 2021–2026

    55.5 °F

  • Average 2021–2026

    65.5 °F

  • Average High 2021–2026

    76 °F
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