Cascade - Fairwood Weather Forecast

    • 52
    • 74

    Sunny

    • 53
    • 75

    Mostly Sunny

    • 52
    • 71

    Mostly Sunny

    • 52
    • 70

    Partly Sunny

    • 52
    • 70

    Partly Sunny

    • 53
    • 69

    Slight Chance Rain

    • 51
    • 67

    Partly Sunny

Today 16 Sep Foothills and Valleys of Pierce and Southern King Counties

Partly sunny. Highs near 70.

Tonight 16 Sep Foothills and Valleys of Pierce and Southern King Counties

Clear. Lows near 50. Light wind.

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Cascade - Fairwood Temperature Statistics

September Temperature

Renton Municipal Airport (3.7 miles)

  • Lowest 6 September, 2026

    51.1 °F

  • Average September

    61.8 °F

  • Highest 9 September, 2026

    79 °F

Climate (2021–2026)

Renton Municipal Airport (3.7 miles)

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  • Average Low 2021–2026

    47.4 °F

  • Average 2021–2026

    54.7 °F

  • Average High 2021–2026

    62.2 °F
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