Union Hill - Novelty Hill Weather Forecast

    • 50
    • 69

    Chance Rain Showers

    • 51
    • 71

    Slight Chance Thunderstorms

    • 54
    • 73

    Chance Rain

    • 55
    • 71

    Slight Chance Rain

    • 54
    • 72

    Partly Sunny

    • 56
    • 76

    Partly Sunny

Today 4 Sep Foothills and Valleys of Central King County

Partly sunny. A slight chance of Thunderstorms early in the afternoon. A chance of Showers and a slight chance of Thunderstorms late in the afternoon. Highs near 70. Light wind.

Tonight 4 Sep Foothills and Valleys of Central King County

Mostly cloudy. A slight chance of rain in the evening. Lows near 50. Light wind.

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Union Hill - Novelty Hill Temperature Statistics

September Temperature

Renton Municipal Airport (14.3 miles)

  • Lowest 1 September, 2026

    57.9 °F

  • Average September

    62.7 °F

  • Highest 1 September, 2026

    66.9 °F

Climate (2021–2026)

Renton Municipal Airport (14.3 miles)

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  • Average Low 2021–2026

    47.5 °F

  • Average 2021–2026

    54.7 °F

  • Average High 2021–2026

    62.2 °F
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