Downtown Seattle Weather Forecast

    • 56
    • 74

    Increasing Clouds

    • 60
    • 73

    Rain

    • 54
    • 66

    Rain

    • 55
    • 69

    Rain

    • 54
    • 65

    Rain

    • 54
    • 65

    Rain Likely

    • 53
    • 66

    Chance Rain

Today 27 Sep City of Seattle

Mostly cloudy until late afternoon then becoming sunny. Highs in the lower to mid 70s. Light wind.

Tonight 27 Sep City of Seattle

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

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Downtown Seattle Temperature Statistics

September Temperature

Boeing Field - King County International Airport (4.3 miles)

  • Lowest 22 September, 2025

    52 °F

  • Average September

    65 °F

  • Highest 16 September, 2025

    91 °F

Climate (2020–Present)

Boeing Field - King County International Airport (4.3 miles)

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  • Average Low 2020–2025

    46.9 °F

  • Average 2020–2025

    54 °F

  • Average High 2020–2025

    61.5 °F
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