Boysen State Park Weather Forecast

    • 45
    • 70

    Mostly Sunny

    • 45
    • 75

    Mostly Sunny

    • 49
    • 78

    Partly Sunny

    • 50
    • 81

    Mostly Sunny

    • 49
    • 80

    Mostly Sunny

    • 47
    • 75

    Mostly Sunny

    • 50
    • 80

    Mostly Sunny

Today 17 Sep Wind River Basin

Partly cloudy. Near steady temperature in the mid 60s. North Winds around 10 Mph with Gusts up to 20 Mph.

Tonight 17 Sep Wind River Basin

Mostly clear. Lows in the lower 40s. Northeast Winds around 10 Mph with Gusts up to 20 Mph in the evening.

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Boysen State Park Temperature Statistics

September Temperature

Riverton Regional Airport (21.7 miles)

  • Lowest 6 September, 2025

    42.1 °F

  • Average September

    65.1 °F

  • Highest 2 September, 2025

    87.1 °F

Climate (2020–Present)

Riverton Regional Airport (21.7 miles)

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  • Average Low 2020–2025

    32.7 °F

  • Average 2020–2025

    45.5 °F

  • Average High 2020–2025

    58.3 °F
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