Sammamish Weather Forecast

    • 41
    • 57

    Rain Likely

    • 45
    • 64

    Increasing Clouds

    • 46
    • 67

    Mostly Cloudy

    • 47
    • 67

    Mostly Cloudy

    • 48
    • 70

    Partly Sunny

    • 49
    • 72

    Partly Sunny

    • 49
    • 72

    Partly Sunny

Today 16 May Eastside

Mostly cloudy. A chance of Showers in the Morning, then Showers likely and a chance of Thunderstorms in the afternoon. Rainfall Amounts a tenth to a quarter of an inch Possible, except higher Amounts possible in Thunderstorms. Highs in the mid to upper 50s. South wind 10 to 15 Mph with Gusts to 25 Mph becoming southwest in the afternoon.

Tonight 16 May Eastside

Mostly cloudy with a chance of rain in the Evening, then mostly cloudy with a slight chance of rain late in the evening. Mostly cloudy after midnight. Lows in the lower to mid 40s. Light wind.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Sammamish Temperature Statistics

May Temperature

Renton Municipal Airport (11.8 miles)

  • Lowest 8 May, 2026

    50 °F

  • Average May

    61.1 °F

  • Highest 12 May, 2026

    82 °F

Climate (2021–Present)

Renton Municipal Airport (11.8 miles)

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  • Average Low 2021–2026

    47.5 °F

  • Average 2021–2026

    54.7 °F

  • Average High 2021–2026

    62.3 °F
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