Capitol Hill Weather Forecast

    • 58
    • 79

    Increasing Clouds

    • 58
    • 77

    Partly Sunny

    • 59
    • 79

    Mostly Sunny

    • 58
    • 78

    Mostly Cloudy

    • 57
    • 72

    Mostly Cloudy

    • 56
    • 73

    Partly Sunny

    • 56
    • 75

    Partly Sunny

Today 18 Aug City of Seattle

Mostly cloudy in the morning then becoming mostly sunny. Patchy fog until late afternoon. Highs in the mid 70s to lower 80s. South wind to 10 Mph becoming southwest in the afternoon.

Tonight 18 Aug City of Seattle

Mostly clear in the evening then becoming mostly cloudy. Lows in the mid to upper 50s. Light wind.

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Capitol Hill Temperature Statistics

August Temperature

Boeing Field - King County International Airport (5 miles)

  • Lowest 3 August, 2026

    55 °F

  • Average August

    68.3 °F

  • Highest 6 August, 2026

    86 °F

Climate (2021–2026)

Boeing Field - King County International Airport (5 miles)

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  • Average Low 2021–2026

    47.1 °F

  • Average 2021–2026

    54.2 °F

  • Average High 2021–2026

    61.6 °F
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