Agate Fossil Beds National Monument Weather Forecast

    • 7
    • 29

    Decreasing Clouds

    • 17
    • 40

    Partly Sunny

    • 19
    • 41

    Mostly Cloudy

    • 17
    • 43

    Mostly Cloudy

    • 21
    • 44

    Partly Sunny

    • 21
    • 49

    Partly Sunny

Today 3 Dec South Sioux

Mostly cloudy. Colder with Highs in the upper 20s. North Winds 10 to 15 Mph.

Tonight 3 Dec South Sioux

Mostly clear. Cold with Lows around 9 above. Southwest Winds 5 to 10 Mph. Wind chill Values as low as 5 below.

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Agate Fossil Beds National Monument Temperature Statistics

December Temperature

Torrington Municipal Airport (32.3 miles)

  • Lowest 1 December, 2025

    3 °F

  • Average December

    20.4 °F

  • Highest 1 December, 2025

    36 °F

Climate (2020–Present)

Torrington Municipal Airport (32.3 miles)

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  • Average Low 2020–2025

    36.1 °F

  • Average 2020–2025

    50.4 °F

  • Average High 2020–2025

    65.1 °F
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