Harrison Weather Forecast

    • 36
    • 58

    Rain Showers

    • 32
    • 44

    Rain Showers

    • 33
    • 55

    Chance Rain Showers

    • 35
    • 60

    Chance Thunderstorms

    • 41
    • 68

    Chance Rain Showers

    • 44
    • 70

    Slight Chance Thunderstorms

Today 18 May North Sioux

Cloudy. A slight chance of Showers this Morning, then Showers likely with a chance of Thunderstorms this afternoon. Breezy, cooler with Highs in the upper 50s. Southeast Winds 15 to 25 Mph with Gusts up to 40 Mph. Chance of rain 60 percent.

Tonight 18 May North Sioux

A chance of Thunderstorms in the evening. Showers. Lows in the upper 30s. East Winds 15 to 20 Mph, becoming north after midnight. Chance of rain 90 percent.

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Harrison Temperature Statistics

May Temperature

Chadron, Chadron Municipal Airport (41 miles)

  • Lowest 3 May, 2025

    28.9 °F

  • Average May

    62.8 °F

  • Highest 11 May, 2025

    93.9 °F

Climate (2020–Present)

Chadron, Chadron Municipal Airport (41 miles)

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  • Average Low 2020–2025

    35.3 °F

  • Average 2020–2025

    49.5 °F

  • Average High 2020–2025

    63.8 °F
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