Riverton Weather Forecast

    • 44
    • 62

    Becoming Sunny

    • 51
    • 65

    Rain Likely

    • 54
    • 64

    Rain

    • 48
    • 60

    Rain

    • 45
    • 55

    Rain

    • 43
    • 54

    Rain

Today 21 Oct Lowlands of Pierce and Southern King Counties

Mostly sunny. Patchy dense fog late in the morning. Highs in the mid 50s to lower 60s. Light wind.

Tonight 21 Oct Lowlands of Pierce and Southern King Counties

Mostly clear. Lows in the upper 30s to mid 40s. Light wind.

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  • Temperature Real-Time

Riverton Temperature Statistics

October Temperature

Seattle, Seattle-Tacoma International Airport (2.5 miles)

  • Lowest 15 October, 2025

    39.9 °F

  • Average October

    54.3 °F

  • Highest 7 October, 2025

    73.9 °F

Climate (2020–Present)

Seattle, Seattle-Tacoma International Airport (2.5 miles)

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  • Average Low 2020–2025

    46.5 °F

  • Average 2020–2025

    53.2 °F

  • Average High 2020–2025

    61.1 °F
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