Rattlesnake Mountain Weather Forecast

    • 68
    • 89

    Patchy Smoke

    • 63
    • 91

    Increasing Clouds

    • 59
    • 77

    Partly Sunny

    • 54
    • 76

    Mostly Sunny

    • 55
    • 65

    Slight Chance Rain

    • 53
    • 68

    Mostly Cloudy

    • 53
    • 67

    Mostly Cloudy

Today 21 Jul Foothills and Valleys of Central King County

Mostly sunny. Patchy smoke in the afternoon. Highs in the lower to mid 90s. Light wind.

Tonight 21 Jul Foothills and Valleys of Central King County

Mostly clear. Patchy smoke. Lows in the 60s. Light wind.

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Rattlesnake Mountain Temperature Statistics

July Temperature

Stampede Pass (24.2 miles)

  • Lowest 1 July, 2026

    39 °F

  • Average July

    55.7 °F

  • Highest 15 July, 2026

    81 °F

Climate (2021–2026)

Stampede Pass (24.2 miles)

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  • Average Low 2021–2026

    36.2 °F

  • Average 2021–2026

    41.6 °F

  • Average High 2021–2026

    48.2 °F
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