Loutsis Dam Weather Forecast

    • 50
    • 67

    Increasing Clouds

    • 47
    • 65

    Slight Chance Rain

    • 49
    • 74

    Mostly Sunny

    • 50
    • 76

    Mostly Sunny

    • 51
    • 74

    Partly Sunny

    • 49
    • 72

    Partly Sunny

    • 50
    • 72

    Partly Sunny

Today 14 Sep Foothills and Valleys of Snohomish and Northern King Counties

Cloudy until late afternoon then becoming partly sunny. Areas of drizzle in the morning. Highs in the 60s. South wind to 10 Mph in the morning becoming light.

Tonight 14 Sep Foothills and Valleys of Snohomish and Northern King Counties

Mostly cloudy. Lows in the upper 40s to mid 50s. Light wind.

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Loutsis Dam Temperature Statistics

September Temperature

Renton Municipal Airport (18.6 miles)

  • Lowest 6 September, 2026

    51.1 °F

  • Average September

    62.1 °F

  • Highest 9 September, 2026

    79 °F

Climate (2021–2026)

Renton Municipal Airport (18.6 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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