Hay Creek Wallace Reservoir Weather Forecast

    • 61
    • 94

    Slight Chance Thunderstorms

    • 59
    • 94

    Mostly Sunny

    • 63
    • 96

    Sunny

    • 67
    • 99

    Hot

    • 62
    • 97

    Hot

    • 57
    • 86

    Chance Thunderstorms

Today 17 Aug North Sioux

Sunny. A slight chance of Showers and Thunderstorms this afternoon. Areas of smoke this afternoon. Hot with Highs in the lower 90s. West Winds 5 to 10 Mph, becoming north this afternoon. Chance of rain 20 percent.

Tonight 17 Aug North Sioux

Partly cloudy with a chance of Showers and Thunderstorms in the Evening, then mostly clear after midnight. Lows in the upper 50s. East Winds 5 to 10 Mph, becoming south after midnight. Chance of rain 30 percent.

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Hay Creek Wallace Reservoir Temperature Statistics

August Temperature

Chadron, Chadron Municipal Airport (44.7 miles)

  • Lowest 9 August, 2025

    50 °F

  • Average August

    75.7 °F

  • Highest 7 August, 2025

    104 °F

Climate (2020–Present)

Chadron, Chadron Municipal Airport (44.7 miles)

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  • Average Low 2020–2025

    35.2 °F

  • Average 2020–2025

    49.3 °F

  • Average High 2020–2025

    63.6 °F
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