Oglala National Grassland Weather Forecast

    • 65
    • 96

    Chance Thunderstorms

    • 63
    • 91

    Slight Chance Thunderstorms

    • 61
    • 92

    Slight Chance Thunderstorms

    • 63
    • 95

    Mostly Sunny

    • 63
    • 96

    Slight Chance Thunderstorms

    • 66
    • 98

    Hot

Today 15 Aug North Sioux

Sunny. A slight chance of Showers and Thunderstorms this afternoon. Hot with Highs in the mid 90s. Southeast Winds around 5 Mph, becoming east 10 to 15 Mph with Gusts up to 25 Mph this afternoon. Chance of rain 20 percent.

Tonight 15 Aug North Sioux

Mostly cloudy. A chance of Showers and Thunderstorms in the evening. Lows in the lower 60s. Southeast Winds 10 to 15 Mph with Gusts up to 25 Mph, becoming southwest 5 to 10 Mph after midnight. Chance of rain 40 percent.

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Oglala National Grassland Temperature Statistics

August Temperature

Chadron, Chadron Municipal Airport (25.5 miles)

  • Lowest 9 August, 2025

    50 °F

  • Average August

    75.1 °F

  • Highest 7 August, 2025

    104 °F

Climate (2020–Present)

Chadron, Chadron Municipal Airport (25.5 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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