Key Way Airport Weather Forecast

    • 42
    • 61

    Mostly Cloudy

    • 42
    • 63

    Partly Sunny

    • 45
    • 70

    Mostly Sunny

    • 55
    • 80

    Mostly Sunny

    • 57
    • 84

    Partly Sunny

    • 52
    • 76

    Partly Sunny

Today 29 May South Washington Cascades

Mostly cloudy. A slight chance of rain Showers this morning. Snow level 7500 feet this morning. West wind 15 to 20 Mph with Gusts up to 35 Mph. Chance of rain 20 percent.

Tonight 29 May South Washington Cascades

Partly cloudy in the Evening, then becoming mostly cloudy. Free air freezing level 6500 Feet, decreasing to free air freezing level 5000 feet after midnight. Northwest wind 15 to 20 Mph. Gusts up to 35 Mph in the evening.

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Key Way Airport Temperature Statistics

May Temperature

Portland, Portland-Troutdale Airport (27.3 miles)

  • Lowest 15 May, 2026

    44.7 °F

  • Average May

    61.5 °F

  • Highest 3 May, 2026

    91.7 °F

Climate (2021–Present)

Portland, Portland-Troutdale Airport (27.3 miles)

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  • Average Low 2021–2026

    47.7 °F

  • Average 2021–2026

    56.3 °F

  • Average High 2021–2026

    65.4 °F
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