Olo Mountain Weather Forecast

    • 47
    • 65

    Decreasing Clouds

    • 53
    • 69

    Mostly Sunny

    • 54
    • 75

    Mostly Sunny

    • 55
    • 75

    Mostly Sunny

    • 52
    • 63

    Mostly Cloudy

    • 52
    • 68

    Partly Sunny

    • 56
    • 76

    Partly Sunny

Today 5 Jul Cascades of Snohomish and Northern King Counties

Mostly sunny. Freezing level near 11500 feet. Afternoon pass Temperatures in the mid 60s. Light wind. Gusts to 20 Mph in the afternoon.

Tonight 5 Jul Cascades of Snohomish and Northern King Counties

Mostly cloudy in the evening then becoming partly cloudy. Freezing level near 12500 feet. Lows in the mid 40s. West wind in the Passes around 10 Mph with Gusts to 20 Mph in the evening becoming light.

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Olo Mountain Temperature Statistics

July Temperature

Arlington Municipal Airport (13.7 miles)

  • Lowest 3 July, 2025

    53.1 °F

  • Average July

    62.6 °F

  • Highest 1 July, 2025

    79 °F

Climate (2020–Present)

Arlington Municipal Airport (13.7 miles)

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  • Average Low 2020–2025

    42.3 °F

  • Average 2020–2025

    50.5 °F

  • Average High 2020–2025

    59.6 °F
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