Bellevue Weather Forecast

    • 54
    • 73

    Increasing Clouds

    • 54
    • 73

    Partly Sunny

    • 54
    • 73

    Partly Sunny

    • 54
    • 72

    Mostly Cloudy

    • 53
    • 69

    Slight Chance Rain

    • 53
    • 68

    Mostly Cloudy

    • 55
    • 70

    Mostly Cloudy

Today 18 Sep Eastside

Partly sunny. A chance of rain in the Morning, then a slight chance of rain in the afternoon. Highs in the mid to upper 60s.

Tonight 18 Sep Eastside

Mostly clear until early morning then becoming mostly cloudy. Lows in the lower to mid 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 5 September, 2026

    53.1 °F

  • Average September

    62.4 °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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