Olo Mountain Weather Forecast

    • 44
    • 55

    Decreasing Clouds

    • 49
    • 64

    Mostly Cloudy

    • 44
    • 58

    Mostly Cloudy

    • 46
    • 64

    Partly Sunny

    • 48
    • 67

    Chance Rain

    • 48
    • 63

    Chance Rain

Today 8 May Cascades of Snohomish and Northern King Counties

Mostly cloudy in the morning then becoming sunny. Freezing level near 10500 feet decreasing to 8000 feet in the afternoon. Afternoon pass Temperatures in the lower 50s. West wind in the Passes 10 to 15 Mph. Gusts to 20 Mph increasing to 30 Mph in the afternoon.

Tonight 8 May Cascades of Snohomish and Northern King Counties

Partly cloudy. Freezing level near 8500 feet. Lows in the upper 30s. West wind in the Passes 10 to 15 Mph with Gusts to 30 Mph in the evening becoming light.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Olo Mountain Temperature Statistics

May Temperature

Arlington Municipal Airport (13.7 miles)

  • Lowest 1 May, 2026

    46 °F

  • Average May

    61.7 °F

  • Highest 4 May, 2026

    79 °F

Climate (2021–Present)

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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