Lake Lucerne Weather Forecast

    • 50
    • 72

    Increasing Clouds

    • 50
    • 74

    Increasing Clouds

    • 50
    • 71

    Mostly Cloudy

    • 48
    • 67

    Mostly Cloudy

    • 47
    • 66

    Mostly Cloudy

    • 47
    • 63

    Slight Chance Rain

    • 46
    • 62

    Slight Chance Rain

Today 19 Sep Foothills and Valleys of Pierce and Southern King Counties

Partly sunny. Highs in the mid 60s.

Tonight 19 Sep Foothills and Valleys of Pierce and Southern King Counties

Mostly clear. Lows near 50. Light wind.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Lake Lucerne Temperature Statistics

September Temperature

Renton Municipal Airport (11.2 miles)

  • Lowest 6 September, 2026

    51.1 °F

  • Average September

    61.9 °F

  • Highest 9 September, 2026

    79 °F

Climate (2021–2026)

Renton Municipal Airport (11.2 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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