Capitol Hill Weather Forecast

    • 53
    • 67

    Chance Rain

    • 52
    • 67

    Mostly Cloudy

    • 52
    • 62

    Rain

    • 50
    • 61

    Rain Showers Likely

    • 49
    • 63

    Mostly Cloudy

    • 50
    • 62

    Chance Rain

Today 22 Sep City of Seattle

Mostly cloudy until late afternoon then becoming mostly sunny. A chance of rain in the Morning, then a slight chance of rain late in the morning. Highs in the mid to upper 60s. Light wind.

Tonight 22 Sep City of Seattle

Mostly cloudy in the evening then becoming partly cloudy. 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 19 September, 2026

    52 °F

  • Average September

    62.2 °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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