Alton Weather Forecast

    • 49
    • 73

    Mostly Cloudy

    • 47
    • 77

    Partly Sunny

    • 41
    • 74

    Sunny

    • 44
    • 73

    Sunny

    • 47
    • 80

    Sunny

    • 47
    • 80

    Sunny

    • 50
    • 82

    Mostly Sunny

Today 3 Oct Crawford

Sunny. Highs in the lower 80s.

Tonight 3 Oct Crawford

Partly cloudy early in the evening then becoming mostly cloudy. Lows around 50. Northeast Winds up to 5 Mph.

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Alton Temperature Statistics

October Temperature

Fort Knox (28.6 miles)

  • Lowest 1 October, 2026

    63.9 °F

  • Average October

    76.1 °F

  • Highest 1 October, 2026

    90.5 °F

Climate (2021–2026)

Fort Knox (28.6 miles)

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  • Average Low 2021–2026

    48.2 °F

  • Average 2021–2026

    57.7 °F

  • Average High 2021–2026

    67.6 °F
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