Agate Dam Reservoir Weather Forecast

    • 54
    • 71

    Rain Showers Likely

    • 53
    • 64

    Rain Showers

    • 47
    • 69

    Chance Rain Showers

    • 48
    • 76

    Mostly Sunny

    • 54
    • 82

    Partly Sunny

    • 52
    • 83

    Mostly Sunny

Today 16 Sep North Sioux

Mostly cloudy with a chance of Showers with a slight chance of Thunderstorms. Not as warm. Near steady temperature in the mid 60s. Northeast Winds around 10 Mph. Chance of rain 40 percent.

Tonight 16 Sep North Sioux

Showers likely. A chance of Thunderstorms, mainly in the evening. Lows in the upper 40s. Northeast Winds 5 to 10 Mph, becoming northwest after midnight. Chance of rain 70 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Agate Dam Reservoir Temperature Statistics

September Temperature

Chadron, Chadron Municipal Airport (22.4 miles)

  • Lowest 6 September, 2025

    30.9 °F

  • Average September

    65.6 °F

  • Highest 11 September, 2025

    93 °F

Climate (2020–Present)

Chadron, Chadron Municipal Airport (22.4 miles)

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  • Average Low 2020–2025

    35.3 °F

  • Average 2020–2025

    49.4 °F

  • Average High 2020–2025

    63.6 °F
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