Capitol Hill Weather Forecast

    • 48
    • 63

    Mostly Cloudy

    • 46
    • 63

    Increasing Clouds

    • 54
    • 65

    Mostly Cloudy

    • 54
    • 63

    Rain Likely

    • 51
    • 63

    Mostly Cloudy

    • 50
    • 63

    Mostly Cloudy

    • 49
    • 62

    Partly Sunny

Today 26 Sep City of Seattle

Mostly sunny. Highs in the lower to mid 60s.

Tonight 26 Sep City of Seattle

Mostly cloudy. Lows near 50. North wind 10 to 15 Mph.

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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 19 September, 2026

    52 °F

  • Average September

    61.8 °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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