West Lake Sammamish Weather Forecast

    • 53
    • 67

    Rain Likely

    • 50
    • 62

    Rain

    • 48
    • 65

    Partly Sunny

    • 50
    • 67

    Mostly Cloudy

    • 49
    • 66

    Partly Sunny

    • 49
    • 67

    Partly Sunny

Today 28 Sep Eastside

Mostly sunny. Highs in the mid to upper 60s. Light wind.

Tonight 28 Sep Eastside

Partly cloudy in the Evening, then mostly cloudy with a slight chance of rain after midnight. Mostly cloudy with a chance of rain in the morning. Lows in the 50s. South wind to 10 Mph increasing to 10 to 15 Mph after midnight. Gusts to 25 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

West Lake Sammamish Temperature Statistics

September Temperature

Renton Municipal Airport (7.5 miles)

  • Lowest 26 September, 2026

    46 °F

  • Average September

    60.9 °F

  • Highest 9 September, 2026

    79 °F

Climate (2021–2026)

Renton Municipal Airport (7.5 miles)

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  • Average Low 2021–2026

    47.4 °F

  • Average 2021–2026

    54.7 °F

  • Average High 2021–2026

    62.2 °F
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