Fallen Leaf Lake Weather Forecast

    • 57
    • 78

    Increasing Clouds

    • 55
    • 77

    Partly Sunny

    • 56
    • 81

    Mostly Sunny

    • 54
    • 80

    Mostly Sunny

    • 57
    • 87

    Sunny

    • 59
    • 91

    Sunny

Today 17 Aug East Clark County Lowlands

Mostly cloudy this Morning, then becoming partly sunny. Highs in the upper 70s. Winds light.

Tonight 17 Aug East Clark County Lowlands

Mostly cloudy. Lows in the upper 50s. Winds light.

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Fallen Leaf Lake Temperature Statistics

August Temperature

Portland, Portland-Troutdale Airport (3.1 miles)

  • Lowest 8 August, 2025

    50.6 °F

  • Average August

    70.4 °F

  • Highest 10 August, 2025

    100.7 °F

Climate (2020–Present)

Portland, Portland-Troutdale Airport (3.1 miles)

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  • Average Low 2020–2025

    47.5 °F

  • Average 2020–2025

    56.1 °F

  • Average High 2020–2025

    65.1 °F
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