Downtown Renton Weather Forecast

    • 55
    • 75

    Mostly Sunny

    • 54
    • 72

    Mostly Sunny

    • 54
    • 71

    Partly Sunny

    • 53
    • 72

    Partly Sunny

    • 55
    • 73

    Partly Sunny

    • 53
    • 69

    Mostly Cloudy

Today 17 Sep Lowlands of Pierce and Southern King Counties

Sunny. Highs in the upper 60s to mid 70s. Northeast wind to 10 Mph becoming north in the afternoon.

Tonight 17 Sep Lowlands of Pierce and Southern King Counties

Clear. Lows in the upper 40s to mid 50s. North wind to 10 Mph becoming southwest after midnight.

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Downtown Renton Temperature Statistics

September Temperature

Renton Municipal Airport (0.6 miles)

  • Lowest 6 September, 2026

    51.1 °F

  • Average September

    61.7 °F

  • Highest 9 September, 2026

    79 °F

Climate (2021–2026)

Renton Municipal Airport (0.6 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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