Capitol Hill Weather Forecast

    • 55
    • 72

    Becoming Sunny

    • 57
    • 75

    Partly Sunny

    • 54
    • 69

    Mostly Cloudy

    • 54
    • 68

    Chance Rain

    • 54
    • 68

    Chance Rain Showers

    • 54
    • 70

    Partly Sunny

Today 8 Sep City of Seattle

Sunny. Areas of fog in the morning. Highs in the upper 60s to mid 70s. Light wind becoming north to 10 Mph in the afternoon.

Tonight 8 Sep City of Seattle

Mostly clear. Lows in the lower to mid 50s. North wind to 10 Mph in the evening becoming light.

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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 °F

  • Highest 6 September, 2026

    73 °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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