Cougar Mountain Weather Forecast

    • 49
    • 56

    Mostly Cloudy

    • 46
    • 60

    Mostly Cloudy

    • 52
    • 69

    Mostly Sunny

    • 53
    • 70

    Rain Likely

    • 45
    • 57

    Chance Rain

    • 47
    • 56

    Rain Likely

Today 13 Oct Foothills and Valleys of Central King County

Partly sunny. Highs near 60. Light wind.

Tonight 13 Oct Foothills and Valleys of Central King County

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

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Cougar Mountain Temperature Statistics

October Temperature

Renton Municipal Airport (5.6 miles)

  • Lowest 11 October, 2026

    43 °F

  • Average October

    57.4 °F

  • Highest 2 October, 2026

    73 °F

Climate (2021–2026)

Renton Municipal Airport (5.6 miles)

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  • Average Low 2021–2026

    47.5 °F

  • Average 2021–2026

    54.7 °F

  • Average High 2021–2026

    62.3 °F
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