Riverton-Boulevard Park Weather Forecast

    • 52
    • 68

    Mostly Cloudy

    • 53
    • 67

    Mostly Cloudy

    • 53
    • 62

    Chance Rain

    • 50
    • 62

    Chance Rain

    • 50
    • 64

    Partly Sunny

Today 22 Sep Lowlands of Pierce and Southern King Counties

Mostly cloudy until late afternoon then becoming mostly sunny. A slight chance of rain in the morning. Highs in the 60s. Light wind becoming west to 10 Mph in the afternoon.

Tonight 22 Sep Lowlands of Pierce and Southern King Counties

Partly cloudy. Lows in the mid 40s to lower 50s. Southwest wind to 10 Mph becoming south after midnight.

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Riverton-Boulevard Park Temperature Statistics

September Temperature

Boeing Field - King County International Airport (2.5 miles)

  • Lowest 19 September, 2026

    52 °F

  • Average September

    62.2 °F

  • Highest 9 September, 2026

    78.1 °F

Climate (2021–2026)

Boeing Field - King County International Airport (2.5 miles)

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  • Average Low 2021–2026

    47.2 °F

  • Average 2021–2026

    54.2 °F

  • Average High 2021–2026

    61.6 °F
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