Olo Mountain Weather Forecast

    • 51
    • 63

    Increasing Clouds

    • 49
    • 61

    Mostly Cloudy

    • 46
    • 62

    Mostly Sunny

    • 53
    • 69

    Mostly Sunny

    • 56
    • 73

    Mostly Sunny

    • 57
    • 73

    Partly Sunny

    • 56
    • 72

    Chance Rain

Today 10 Jul Cascades of Snohomish and Northern King Counties

Mostly sunny. Freezing level near 12500 feet. Afternoon pass Temperatures in the upper 60s. Light wind becoming west around 10 Mph with Gusts to 20 Mph in the afternoon.

Tonight 10 Jul Cascades of Snohomish and Northern King Counties

Partly cloudy in the evening then becoming mostly cloudy. A slight chance of Showers late in the night. Snow level near 9000 feet. Lows in the upper 40s. West wind in the Passes around 10 Mph in the evening becoming light.

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Olo Mountain Temperature Statistics

July Temperature

Arlington Municipal Airport (13.7 miles)

  • Lowest 5 July, 2026

    46.4 °F

  • Average July

    60.9 °F

  • Highest 6 July, 2026

    81 °F

Climate (2021–2026)

Arlington Municipal Airport (13.7 miles)

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  • Average Low 2021–2026

    42.6 °F

  • Average 2021–2026

    50.9 °F

  • Average High 2021–2026

    59.9 °F
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