Alton Weather Forecast

    • 38
    • 58

    Becoming Sunny

    • 36
    • 65

    Mostly Sunny

    • 35
    • 55

    Mostly Sunny

    • 49
    • 71

    Partly Sunny

    • 52
    • 72

    Partly Sunny

    • 54
    • 76

    Partly Sunny

Today 5 Apr Crawford

Cooler. Mostly sunny. Highs in the upper 50s. Northwest Winds up to 10 Mph.

Tonight 5 Apr Crawford

Mostly clear. Lows in the upper 30s. West Winds up to 5 Mph.

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Alton Temperature Statistics

April Temperature

Fort Knox (28.6 miles)

  • Lowest 2 April, 2026

    63.1 °F

  • Average April

    71.4 °F

  • Highest 1 April, 2026

    84.6 °F

Climate (2021–Present)

Fort Knox (28.6 miles)

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  • Average Low 2021–2026

    47.8 °F

  • Average 2021–2026

    57.3 °F

  • Average High 2021–2026

    67.2 °F
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