Gregg Lake Weather Forecast

    • 34
    • 67

    Partly Sunny

    • 36
    • 60

    Mostly Cloudy

    • 40
    • 65

    Partly Sunny

    • 34
    • 63

    Partly Sunny

    • 27
    • 59

    Partly Sunny

    • 18
    • 47

    Mostly Sunny

Today 22 Dec Box Butte

Mostly sunny. Warmer with Highs in the upper 60s. Temperature falling into the upper 50s this afternoon. West Winds 15 to 20 Mph with Gusts up to 30 Mph.

Tonight 22 Dec Box Butte

Partly cloudy. Cold with Lows in the lower 30s. West Winds 5 to 10 Mph, becoming south after midnight.

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Gregg Lake Temperature Statistics

December Temperature

Chadron, Chadron Municipal Airport (29.2 miles)

  • Lowest 1 December, 2025

    0 °F

  • Average December

    33.1 °F

  • Highest 11 December, 2025

    66.9 °F

Climate (2020–Present)

Chadron, Chadron Municipal Airport (29.2 miles)

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  • Average Low 2020–2025

    35.6 °F

  • Average 2020–2025

    49.6 °F

  • Average High 2020–2025

    63.6 °F
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