Olo Mountain Weather Forecast

    • 55
    • 72

    Increasing Clouds

    • 55
    • 71

    Mostly Cloudy

    • 54
    • 72

    Partly Sunny

    • 52
    • 68

    Partly Sunny

    • 53
    • 67

    Partly Sunny

    • 54
    • 70

    Partly Sunny

Today 15 Aug Cascades of Snohomish and Northern King Counties

Partly sunny. Patchy smoke through the day. A chance of Showers and a slight chance of Thunderstorms early in the afternoon. A chance of Thunderstorms late in the afternoon. Snow level near 10500 feet. Afternoon pass Temperatures in the lower 70s. Light wind.

Tonight 15 Aug Cascades of Snohomish and Northern King Counties

Mostly cloudy. A slight chance of Thunderstorms in the evening. Patchy smoke in the evening. Snow level near 11000 feet. Lows in the lower 50s. Light wind.

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Olo Mountain Temperature Statistics

August Temperature

Arlington Municipal Airport (13.7 miles)

  • Lowest 3 August, 2026

    46.4 °F

  • Average August

    64.2 °F

  • Highest 6 August, 2026

    84.9 °F

Climate (2021–2026)

Arlington Municipal Airport (13.7 miles)

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  • Average Low 2021–2026

    42.5 °F

  • Average 2021–2026

    50.8 °F

  • Average High 2021–2026

    59.8 °F
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