Steamboat Lake Weather Forecast

    • 41
    • 76

    Rain Showers

    • 46
    • 70

    Thunderstorms

    • 44
    • 64

    Rain Showers

    • 42
    • 71

    Isolated Thunderstorms

    • 45
    • 75

    Mostly Sunny

    • 47
    • 78

    Mostly Sunny

Today 15 Sep Green Mountains and Rattlesnake Range

Partly cloudy in the Morning, then clearing. A chance of Showers. A slight chance of Thunderstorms in the afternoon. Breezy with Highs in the upper 60s. Southwest Winds 15 to 25 Mph. Gusts up to 40 Mph in the afternoon. Chance of rain 30 percent.

Tonight 15 Sep Green Mountains and Rattlesnake Range

Mostly clear. Near steady temperature around 50. Southwest Winds around 10 Mph with Gusts up to 20 Mph.

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Steamboat Lake Temperature Statistics

September Temperature

Casper, Natrona County International Airport (38.5 miles)

  • Lowest 6 September, 2025

    37.9 °F

  • Average September

    65.9 °F

  • Highest 10 September, 2025

    90 °F

Climate (2020–Present)

Casper, Natrona County International Airport (38.5 miles)

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  • Average Low 2020–2025

    32.6 °F

  • Average 2020–2025

    46.7 °F

  • Average High 2020–2025

    60.3 °F
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