Alton Weather Forecast

    • 49
    • 98

    Hot

    • 35
    • 66

    Breezy

    • 38
    • 61

    Mostly Cloudy

    • 47
    • 76

    Partly Sunny

    • 52
    • 88

    Mostly Sunny

    • 38
    • 79

    Partly Sunny

    • 34
    • 60

    Mostly Cloudy

Today 21 Mar Osborne

Sunny. Southwest Winds around 15 Mph with Gusts to around 25 Mph.

Tonight 21 Mar Osborne

Clear. Lows around 50. Southwest Winds 10 to 20 Mph with Gusts to around 30 Mph.

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  • Temperature Real-Time

Alton Temperature Statistics

March Temperature

Russell, Russell Municipal Airport (41.6 miles)

  • Lowest 16 March, 2026

    8.7 °F

  • Average March

    46.5 °F

  • Highest 19 March, 2026

    84.9 °F

Climate (2021–Present)

Russell, Russell Municipal Airport (41.6 miles)

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  • Average Low 2021–2026

    43.9 °F

  • Average 2021–2026

    56.5 °F

  • Average High 2021–2026

    69.8 °F
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