Alton Weather Forecast

    • 62
    • 90

    Rain Showers Likely

    • 61
    • 82

    Rain Showers Likely

    • 57
    • 79

    Chance Thunderstorms

    • 64
    • 86

    Slight Chance Thunderstorms

    • 70
    • 91

    Mostly Sunny

    • 72
    • 94

    Mostly Sunny

Today 16 Jun Sioux

Partly sunny. A chance of Showers and Thunderstorms in the afternoon. Humid with Highs in the lower 90s. South Winds 10 to 15 Mph with Gusts up to 25 Mph. Chance of rain 40 percent.

Tonight 16 Jun Sioux

Mostly cloudy. Near steady temperature in the upper 60s. South Winds around 10 Mph.

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Alton Temperature Statistics

June Temperature

Le Mars Municipal Airport (16.8 miles)

  • Lowest 4 June, 2025

    48.2 °F

  • Average June

    68.6 °F

  • Highest 2 June, 2025

    93.2 °F

Climate (2020–Present)

Le Mars Municipal Airport (16.8 miles)

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  • Average Low 2020–2025

    37.5 °F

  • Average 2020–2025

    48.7 °F

  • Average High 2020–2025

    59.8 °F
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