Bellevue Weather Forecast

    • 55
    • 70

    Rain

    • 56
    • 64

    Rain

    • 54
    • 70

    Mostly Cloudy

    • 53
    • 70

    Mostly Sunny

    • 54
    • 75

    Mostly Sunny

    • 56
    • 77

    Mostly Sunny

    • 57
    • 79

    Mostly Sunny

Today 12 Sep Eastside

Mostly cloudy. Highs near 70. Light wind.

Tonight 12 Sep Eastside

A chance of rain in the Evening, then rain after midnight. Rainfall Amounts a quarter to a half inch possible. Lows in the lower to mid 50s. Light wind becoming south to 10 Mph after midnight.

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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

    63.1 °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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