Alton Weather Forecast

    • 61
    • 78

    Slight Chance Thunderstorms

    • 65
    • 88

    Slight Chance Thunderstorms

    • 69
    • 95

    Mostly Sunny

    • 73
    • 100

    Hot

    • 76
    • 102

    Hot

    • 74
    • 100

    Hot

Today 5 Aug Osborne

Mostly cloudy with a 50 percent chance of Showers and Thunderstorms. Highs in the upper 70s. Northeast Winds 10 to 15 Mph.

Tonight 5 Aug Osborne

Partly cloudy. Patchy fog after midnight. Lows in the lower 60s. Northeast Winds around 10 Mph.

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Alton Temperature Statistics

August Temperature

Russell, Russell Municipal Airport (41.6 miles)

  • Lowest 1 August, 2026

    60.7 °F

  • Average August

    79.5 °F

  • Highest 3 August, 2026

    99 °F

Climate (2021–2026)

Russell, Russell Municipal Airport (41.6 miles)

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  • Average Low 2021–2026

    44 °F

  • Average 2021–2026

    56.9 °F

  • Average High 2021–2026

    70.2 °F
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