Sammamish Weather Forecast

    • 51
    • 75

    Becoming Sunny

    • 55
    • 79

    Mostly Sunny

    • 58
    • 86

    Sunny

    • 61
    • 87

    Mostly Sunny

    • 61
    • 87

    Mostly Sunny

    • 60
    • 86

    Mostly Sunny

Today 20 Aug Eastside

Cloudy in the morning then becoming mostly sunny. Highs in the 70s. Light wind.

Tonight 20 Aug Eastside

Clear. Lows in the lower to mid 50s. Light wind.

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Sammamish Temperature Statistics

August Temperature

Renton Municipal Airport (11.8 miles)

  • Lowest 8 August, 2025

    52.6 °F

  • Average August

    69.7 °F

  • Highest 12 August, 2025

    92.6 °F

Climate (2020–Present)

Renton Municipal Airport (11.8 miles)

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  • Average Low 2020–2025

    47.3 °F

  • Average 2020–2025

    54.5 °F

  • Average High 2020–2025

    62.2 °F
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