Issaquah Weather Forecast

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    • 57

    Chance Rain

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    • 58

    Chance Rain

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    • 58

    Slight Chance Rain

    • 43
    • 59

    Mostly Cloudy

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    • 59

    Mostly Cloudy

Today 24 Oct Eastside

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

Tonight 24 Oct Eastside

Cloudy. A chance of rain in the morning. Lows in the 40s. Light wind.

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Issaquah Temperature Statistics

October Temperature

Renton Municipal Airport (8.7 miles)

  • Lowest 12 October, 2026

    39.9 °F

  • Average October

    55.9 °F

  • Highest 16 October, 2026

    75.9 °F

Climate (2021–2026)

Renton Municipal Airport (8.7 miles)

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  • Average Low 2021–2026

    47.4 °F

  • Average 2021–2026

    54.7 °F

  • Average High 2021–2026

    62.3 °F
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