Gregg Lake Weather Forecast

    • 49
    • 72

    Rain Showers Likely

    • 46
    • 64

    Rain Showers Likely

    • 48
    • 67

    Slight Chance Rain Showers

    • 53
    • 73

    Partly Sunny

    • 53
    • 77

    Slight Chance Thunderstorms

    • 53
    • 79

    Partly Sunny

Today 19 Sep Box Butte

Partly sunny. A chance of Showers and Thunderstorms in the afternoon. Highs in the lower 70s. East Winds 5 to 10 Mph. Chance of rain 40 percent.

Tonight 19 Sep Box Butte

Mostly cloudy. Showers likely with a chance of Thunderstorms in the Evening, then a chance of Showers after midnight. Lows in the upper 40s. East Winds 10 to 15 Mph. Chance of rain 70 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Gregg Lake Temperature Statistics

September Temperature

Chadron, Chadron Municipal Airport (29.2 miles)

  • Lowest 15 September, 2026

    55 °F

  • Average September

    66 °F

  • Highest 16 September, 2026

    86 °F

Climate (2021–2026)

Chadron, Chadron Municipal Airport (29.2 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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