Walthill Weather Forecast

    • 67
    • 91

    Thunderstorms Likely

    • 65
    • 82

    Chance Thunderstorms

    • 67
    • 83

    Slight Chance Thunderstorms

    • 70
    • 90

    Mostly Sunny

    • 71
    • 93

    Mostly Sunny

    • 70
    • 94

    Slight Chance Thunderstorms

Today 23 Jul Thurston

Sunny. A slight 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 20 percent. Heat index Values up to 102 in the afternoon.

Tonight 23 Jul Thurston

Showers likely. Thunderstorms Likely, mainly in the evening. Humid with Lows in the upper 60s. Northwest Winds 10 to 15 Mph. Chance of rain 70 percent.

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Walthill Temperature Statistics

July Temperature

Sioux City, Sioux Gateway Airport (18 miles)

  • Lowest 17 July, 2025

    56.6 °F

  • Average July

    75.2 °F

  • Highest 3 July, 2025

    93.7 °F

Climate (2020–Present)

Sioux City, Sioux Gateway Airport (18 miles)

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  • Average Low 2020–2025

    38.7 °F

  • Average 2020–2025

    50.6 °F

  • Average High 2020–2025

    62.6 °F
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