Cougar Mountain Weather Forecast

    • 38
    • 54

    Sunny

    • 41
    • 57

    Sunny

    • 43
    • 59

    Mostly Sunny

    • 48
    • 56

    Rain Likely

    • 46
    • 56

    Slight Chance Rain

    • 47
    • 56

    Rain

    • 44
    • 53

    Rain

Today 13 Oct Foothills and Valleys of Central King County

Sunny. A slight chance of rain Showers in the morning. Highs in the mid 50s to lower 60s. North wind to 10 Mph.

Tonight 13 Oct Foothills and Valleys of Central King County

Clear. Areas of frost late in the night. Lows in the 30s. North wind to 10 Mph in the evening becoming light.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Cougar Mountain Temperature Statistics

October Temperature

Renton Municipal Airport (5.6 miles)

  • Lowest 6 October, 2025

    45 °F

  • Average October

    57.8 °F

  • Highest 7 October, 2025

    75.9 °F

Climate (2020–Present)

Renton Municipal Airport (5.6 miles)

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  • Average Low 2020–2025

    47.3 °F

  • Average 2020–2025

    54.5 °F

  • Average High 2020–2025

    62.2 °F
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