Thermopolis Weather Forecast

    • 47
    • 78

    Mostly Sunny

    • 50
    • 81

    Partly Sunny

    • 50
    • 83

    Mostly Sunny

    • 47
    • 81

    Mostly Sunny

    • 43
    • 71

    Sunny

    • 46
    • 78

    Mostly Sunny

Today 18 Sep Southwest Bighorn Basin

Sunny. Highs in the mid 70s.

Tonight 18 Sep Southwest Bighorn Basin

Clear. Lows in the mid 40s.

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Thermopolis Temperature Statistics

September Temperature

Worland, Worland Municipal Airport (25.5 miles)

  • Lowest 6 September, 2025

    39.9 °F

  • Average September

    64.1 °F

  • Highest 10 September, 2025

    90 °F

Climate (2020–Present)

Worland, Worland Municipal Airport (25.5 miles)

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  • Average Low 2020–2025

    30.3 °F

  • Average 2020–2025

    45.1 °F

  • Average High 2020–2025

    60.2 °F
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