Alton Weather Forecast

    • 44
    • 61

    Rain Showers

    • 36
    • 61

    Rain Showers

    • 32
    • 50

    Mostly Sunny

    • 44
    • 59

    Slight Chance Rain

    • 40
    • 60

    Partly Sunny

    • 44
    • 59

    Mostly Cloudy

    • 47
    • 64

    Partly Sunny

Today 17 Dec Jefferson

Partly sunny. Highs in the lower 60s. South Winds around 5 Mph.

Tonight 17 Dec Jefferson

Cloudy. A slight chance of Showers after midnight. Not as cool with Lows in the mid 40s. Southeast Winds around 5 Mph. Chance of rain 20 percent.

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Alton Temperature Statistics

December Temperature

Birmingham, Birmingham International Airport (6.2 miles)

  • Lowest 15 December, 2025

    15.1 °F

  • Average December

    42.5 °F

  • Highest 13 December, 2025

    68 °F

Climate (2020–Present)

Birmingham, Birmingham International Airport (6.2 miles)

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  • Average Low 2020–2025

    55.3 °F

  • Average 2020–2025

    65.2 °F

  • Average High 2020–2025

    75.6 °F
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