Steamboat Lake Weather Forecast

    • 37
    • 74

    Mostly Sunny

    • 38
    • 73

    Mostly Sunny

    • 42
    • 76

    Mostly Sunny

    • 39
    • 72

    Mostly Sunny

    • 42
    • 75

    Mostly Sunny

    • 44
    • 79

    Partly Sunny

Today 30 Sep Green Mountains and Rattlesnake Range

Mostly sunny. Highs around 70. Northeast Winds around 10 Mph in the afternoon.

Tonight 30 Sep Green Mountains and Rattlesnake Range

Mostly clear. Lows around 40. Northeast Winds around 10 Mph after midnight. Gusts up to 25 Mph.

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Steamboat Lake Temperature Statistics

September Temperature

Casper, Natrona County International Airport (38.5 miles)

  • Lowest 9 September, 2026

    36.6 °F

  • Average September

    64.1 °F

  • Highest 5 September, 2026

    91.7 °F

Climate (2021–2026)

Casper, Natrona County International Airport (38.5 miles)

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  • Average Low 2021–2026

    33.3 °F

  • Average 2021–2026

    47.7 °F

  • Average High 2021–2026

    61.6 °F
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