Issaquah Highlands Weather Forecast

    • 49
    • 64

    Rain

    • 44
    • 59

    Rain

    • 41
    • 55

    Rain

    • 40
    • 52

    Rain

    • 38
    • 52

    Rain Likely

    • 41
    • 54

    Rain Likely

Today 23 Oct Foothills and Valleys of Central King County

Mostly cloudy. A slight chance of rain in the morning. Highs in the lower to mid 60s. Southeast wind to 10 Mph in the morning becoming light.

Tonight 23 Oct Foothills and Valleys of Central King County

Mostly cloudy. A slight chance of rain in the Evening, then a chance of rain after midnight. Lows near 50. Light wind becoming southeast 10 to 15 Mph after midnight.

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Issaquah Highlands Temperature Statistics

October Temperature

Renton Municipal Airport (10.6 miles)

  • Lowest 15 October, 2025

    36 °F

  • Average October

    55 °F

  • Highest 7 October, 2025

    75.9 °F

Climate (2020–Present)

Renton Municipal Airport (10.6 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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