Rasmus Lee Lake Weather Forecast

    • 43
    • 68

    Becoming Sunny

    • 49
    • 79

    Mostly Sunny

    • 52
    • 85

    Slight Chance Thunderstorms

    • 51
    • 84

    Partly Sunny

    • 53
    • 84

    Slight Chance Thunderstorms

    • 53
    • 83

    Slight Chance Thunderstorms

    • 51
    • 81

    Slight Chance Thunderstorms

Today 5 Sep Natrona County Lower Elevations

Sunny. Areas of smoke. Highs in the mid 60s. North Winds around 10 Mph.

Tonight 5 Sep Natrona County Lower Elevations

Clear. Lows in the lower 40s. Northeast Winds around 10 Mph with Gusts up to 20 Mph, becoming southeast after midnight.

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Rasmus Lee Lake Temperature Statistics

September Temperature

Casper, Natrona County International Airport (13 miles)

  • Lowest 1 September, 2025

    44.1 °F

  • Average September

    69.9 °F

  • Highest 3 September, 2025

    87.1 °F

Climate (2020–Present)

Casper, Natrona County International Airport (13 miles)

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  • Average Low 2020–2025

    32.5 °F

  • Average 2020–2025

    46.6 °F

  • Average High 2020–2025

    60.2 °F
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