Union Hill - Novelty Hill Weather Forecast

    • 50
    • 71

    Becoming Sunny

    • 52
    • 75

    Mostly Sunny

    • 56
    • 73

    Rain

    • 50
    • 68

    Chance Rain

    • 53
    • 71

    Partly Sunny

    • 55
    • 73

    Chance Rain

Today 18 Sep Foothills and Valleys of Central King County

Partly sunny until late afternoon then becoming sunny. Highs in the lower to mid 70s. Light wind becoming northwest to 10 Mph in the afternoon.

Tonight 18 Sep Foothills and Valleys of Central King County

Mostly clear. Lows near 50. Light wind.

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Union Hill - Novelty Hill Temperature Statistics

September Temperature

Renton Municipal Airport (14.3 miles)

  • Lowest 15 September, 2025

    53.1 °F

  • Average September

    66.7 °F

  • Highest 16 September, 2025

    91 °F

Climate (2020–Present)

Renton Municipal Airport (14.3 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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