Alton Weather Forecast

    • 37
    • 60

    Increasing Clouds

    • 44
    • 52

    Rain

    • 38
    • 58

    Partly Sunny

    • 44
    • 62

    Mostly Cloudy

    • 54
    • 65

    Mostly Cloudy

    • 46
    • 72

    Slight Chance Rain

    • 40
    • 64

    Partly Sunny

Today 13 Feb Madison

Sunny. Highs around 60. South Winds 5 to 10 Mph.

Tonight 13 Feb Madison

Partly cloudy in the Evening, then becoming mostly cloudy. Lows around 40. South Winds around 5 Mph.

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Alton Temperature Statistics

February Temperature

St. Louis Regional Airport (8.1 miles)

  • Lowest 1 February, 2026

    1.2 °F

  • Average February

    29.8 °F

  • Highest 10 February, 2026

    64.4 °F

Climate (2021–Present)

St. Louis Regional Airport (8.1 miles)

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  • Average Low 2021–2026

    46.1 °F

  • Average 2021–2026

    54.1 °F

  • Average High 2021–2026

    66.3 °F
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