Capitol Hill Weather Forecast

    • 55
    • 68

    Cloudy

    • 55
    • 70

    Rain

    • 55
    • 67

    Rain Likely

    • 53
    • 69

    Partly Sunny

    • 54
    • 70

    Mostly Sunny

    • 55
    • 75

    Mostly Sunny

    • 56
    • 77

    Sunny

Today 11 Sep City of Seattle

Mostly cloudy. Highs in the mid 60s to lower 70s. South wind around 10 Mph in the morning becoming light.

Tonight 11 Sep City of Seattle

Cloudy. Lows in the mid to upper 50s. Light wind becoming north to 10 Mph after midnight.

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  • Temperature Real-Time

Capitol Hill Temperature Statistics

September Temperature

Boeing Field - King County International Airport (5 miles)

  • Lowest 5 September, 2026

    53.1 °F

  • Average September

    62.8 °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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