Alton Weather Forecast

    • 20
    • 40

    Chance Rain Showers

    • 2
    • 26

    Mostly Cloudy

    • 7
    • 18

    Partly Sunny

    • 2
    • 19

    Mostly Sunny

    • 17
    • 28

    Partly Sunny

    • 19
    • 38

    Mostly Cloudy

Today 18 Jan Crawford

Cloudy. Chance of rain Showers in the Morning, then slight chance of rain Showers in the afternoon. Highs around 40. West Winds up to 5 Mph shifting to the north in the afternoon. Chance of Showers 50 percent.

Tonight 18 Jan Crawford

Colder, cloudy. Chance of Flurries through the night. Lows around 20. North Winds 5 to 10 Mph.

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Alton Temperature Statistics

January Temperature

Fort Knox (28.6 miles)

  • Lowest 9 January, 2025

    7.9 °F

  • Average January

    26.6 °F

  • Highest 2 January, 2025

    43.9 °F

Climate (2020–Present)

Fort Knox (28.6 miles)

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  • Average Low 2020–2025

    47.3 °F

  • Average 2020–2025

    56.9 °F

  • Average High 2020–2025

    66.7 °F
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