Retreat Lake Weather Forecast

    • 54
    • 76

    Mostly Cloudy

    • 53
    • 72

    Chance Rain

    • 50
    • 67

    Rain

    • 49
    • 63

    Rain Showers

    • 49
    • 66

    Chance Rain

    • 51
    • 70

    Mostly Cloudy

    • 52
    • 71

    Chance Rain

Today 31 Aug Foothills and Valleys of Pierce and Southern King Counties

Mostly sunny. Patchy fog in the morning. Highs in the mid 70s to lower 80s. Light wind.

Tonight 31 Aug Foothills and Valleys of Pierce and Southern King Counties

Mostly cloudy in the evening then becoming partly cloudy. Lows in the lower to mid 50s. Light wind.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Retreat Lake Temperature Statistics

August Temperature

Renton Municipal Airport (16.2 miles)

  • Lowest 3 August, 2026

    52 °F

  • Average August

    68.3 °F

  • Highest 6 August, 2026

    87.1 °F

Climate (2021–2026)

Renton Municipal Airport (16.2 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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