South - Lake Union Weather Forecast

    • 60
    • 82

    Increasing Clouds

    • 59
    • 79

    Mostly Cloudy

    • 56
    • 79

    Partly Sunny

    • 56
    • 75

    Partly Sunny

    • 57
    • 73

    Mostly Cloudy

    • 59
    • 74

    Mostly Cloudy

Today 31 Jul City of Seattle

Mostly sunny. Highs in the upper 70s to mid 80s. Light wind.

Tonight 31 Jul City of Seattle

Mostly cloudy. Lows near 60. Light wind.

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  • Temperature Real-Time

South - Lake Union Temperature Statistics

July Temperature

Boeing Field - King County International Airport (5.6 miles)

  • Lowest 20 July, 2025

    53.7 °F

  • Average July

    69 °F

  • Highest 16 July, 2025

    94.6 °F

Climate (2020–Present)

Boeing Field - King County International Airport (5.6 miles)

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  • Average Low 2020–2025

    46.9 °F

  • Average 2020–2025

    54 °F

  • Average High 2020–2025

    61.4 °F
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