Belltown Weather Forecast

    • 54
    • 66

    Mostly Sunny

    • 55
    • 72

    Mostly Sunny

    • 55
    • 73

    Mostly Sunny

    • 55
    • 72

    Partly Sunny

    • 54
    • 70

    Partly Sunny

    • 55
    • 71

    Partly Sunny

    • 55
    • 70

    Slight Chance Rain

Today 15 Sep City of Seattle

Partly sunny with a slight chance of rain. Highs near 70.

Tonight 15 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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Belltown Temperature Statistics

September Temperature

Boeing Field - King County International Airport (5 miles)

  • Lowest 5 September, 2026

    53.1 °F

  • Average September

    62.5 °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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