Rainier Beach Weather Forecast

    • 55
    • 76

    Mostly Sunny

    • 53
    • 70

    Partly Sunny

    • 53
    • 73

    Mostly Sunny

    • 59
    • 72

    Rain Likely

    • 53
    • 69

    Slight Chance Rain

    • 54
    • 71

    Partly Sunny

    • 57
    • 70

    Slight Chance Rain

Today 17 Sep City of Seattle

Sunny. Highs in the 70s. Light wind becoming northwest to 10 Mph in the afternoon.

Tonight 17 Sep City of Seattle

Mostly clear. Lows in the lower to mid 50s. North wind around 10 Mph becoming northeast to 10 Mph after midnight.

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Rainier Beach Temperature Statistics

September Temperature

Renton Municipal Airport (2.5 miles)

  • Lowest 15 September, 2025

    53.1 °F

  • Average September

    66.2 °F

  • Highest 3 September, 2025

    82.9 °F

Climate (2020–Present)

Renton Municipal Airport (2.5 miles)

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  • Average Low 2020–2025

    47.3 °F

  • Average 2020–2025

    54.5 °F

  • Average High 2020–2025

    62.2 °F
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