Capitol Hill Weather Forecast

    • 54
    • 73

    Mostly Sunny

    • 54
    • 71

    Partly Sunny

    • 53
    • 69

    Partly Sunny

    • 53
    • 69

    Partly Sunny

    • 54
    • 69

    Partly Sunny

    • 53
    • 66

    Mostly Cloudy

Today 17 Sep City of Seattle

Sunny. Highs in the upper 60s to mid 70s. North wind to 10 Mph.

Tonight 17 Sep City of Seattle

Clear. Lows in the lower to mid 50s. Light wind.

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Capitol Hill Temperature Statistics

September Temperature

Boeing Field - King County International Airport (5 miles)

  • Lowest 5 September, 2026

    53.1 °F

  • Average September

    62.4 °F

  • Highest 9 September, 2026

    78.1 °F

Climate (2021–2026)

Boeing Field - King County International Airport (5 miles)

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  • Average Low 2021–2026

    47.2 °F

  • Average 2021–2026

    54.2 °F

  • Average High 2021–2026

    61.6 °F
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