Bellevue Weather Forecast

    • 57
    • 73

    Increasing Clouds

    • 54
    • 69

    Mostly Cloudy

    • 56
    • 73

    Mostly Sunny

    • 58
    • 77

    Mostly Sunny

    • 55
    • 73

    Mostly Cloudy

    • 55
    • 70

    Slight Chance Rain

    • 55
    • 72

    Partly Sunny

Today 6 Sep Eastside

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

Tonight 6 Sep Eastside

Partly cloudy. Lows in the mid to upper 50s. Light wind.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Bellevue Temperature Statistics

September Temperature

Boeing Field - King County International Airport (6.8 miles)

  • Lowest 4 September, 2026

    54 °F

  • Average September

    61.4 °F

  • Highest 2 September, 2026

    71.1 °F

Climate (2021–2026)

Boeing Field - King County International Airport (6.8 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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