Capitol Hill Weather Forecast

    • 54
    • 70

    Slight Chance Rain

    • 55
    • 71

    Partly Sunny

    • 55
    • 70

    Mostly Cloudy

    • 55
    • 71

    Partly Sunny

    • 56
    • 75

    Mostly Sunny

    • 57
    • 74

    Mostly Cloudy

Today 5 Sep City of Seattle

Partly sunny. Highs in the mid 60s to lower 70s. Light wind.

Tonight 5 Sep City of Seattle

Partly cloudy. A slight chance of rain in the evening. Lows in the lower to mid 50s. Light wind.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Capitol Hill Temperature Statistics

September Temperature

Boeing Field - King County International Airport (5 miles)

  • Lowest 2 September, 2026

    55 °F

  • Average September

    61.4 °F

  • Highest 2 September, 2026

    71.1 °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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