Alton Weather Forecast

    • 64
    • 89

    Becoming Sunny

    • 74
    • 93

    Mostly Sunny

    • 68
    • 100

    Hot

    • 59
    • 87

    Mostly Sunny

    • 61
    • 83

    Slight Chance Thunderstorms

    • 63
    • 85

    Slight Chance Thunderstorms

Today 18 Jul Sioux

Sunny with Highs in the upper 80s. Northeast Winds 5 to 10 Mph.

Tonight 18 Jul Sioux

Mostly clear in the Evening, then becoming partly cloudy. Lows in the mid 60s. East Winds 5 to 10 Mph.

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Alton Temperature Statistics

July Temperature

Le Mars Municipal Airport (16.8 miles)

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Climate (2021–2026)

Le Mars Municipal Airport (16.8 miles)

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  • Average Low 2021–2026

    36.9 °F

  • Average 2021–2026

    48.1 °F

  • Average High 2021–2026

    59.4 °F
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