Bellevue Weather Forecast

    • 52
    • 67

    Becoming Sunny

    • 53
    • 74

    Mostly Sunny

    • 55
    • 75

    Mostly Sunny

    • 54
    • 73

    Mostly Sunny

    • 54
    • 72

    Partly Sunny

    • 55
    • 73

    Partly Sunny

    • 55
    • 71

    Mostly Cloudy

Today 15 Sep Eastside

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

Tonight 15 Sep Eastside

Mostly clear. Patchy fog late in the night. Lows in the upper 40s to mid 50s. Light wind.

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  • Temperature Real-Time

Bellevue Temperature Statistics

September Temperature

Boeing Field - King County International Airport (6.8 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 (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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