Oglala National Grassland Weather Forecast

    • 50
    • 67

    Rain Showers

    • 50
    • 67

    Slight Chance Rain Showers

    • 54
    • 75

    Breezy

    • 53
    • 81

    Slight Chance Thunderstorms

    • 54
    • 83

    Mostly Sunny

    • 57
    • 83

    Partly Sunny

Today 20 Sep North Sioux

Showers with a chance of Thunderstorms. Highs in the lower 60s. Northwest Winds 10 to 15 Mph. Chance of rain 90 percent.

Tonight 20 Sep North Sioux

Mostly cloudy. Showers Likely, mainly in the evening. Lows in the mid 40s. North Winds 5 to 10 Mph. Chance of rain 70 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Oglala National Grassland Temperature Statistics

September Temperature

Chadron, Chadron Municipal Airport (25.5 miles)

  • Lowest 17 September, 2026

    53.1 °F

  • Average September

    66.5 °F

  • Highest 16 September, 2026

    86 °F

Climate (2021–2026)

Chadron, Chadron Municipal Airport (25.5 miles)

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  • Average Low 2021–2026

    35.9 °F

  • Average 2021–2026

    50 °F

  • Average High 2021–2026

    64.2 °F
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