Portland International Airport Weather Forecast

    • 51
    • 73

    Decreasing Clouds

    • 55
    • 85

    Mostly Sunny

    • 54
    • 83

    Mostly Sunny

    • 51
    • 81

    Partly Sunny

    • 52
    • 79

    Mostly Cloudy

    • 47
    • 65

    Rain Likely

Today 20 May Inner Portland Metro

Mostly sunny. Highs in the lower 70s. North wind 5 to 10 Mph.

Tonight 20 May Inner Portland Metro

Partly cloudy in the Evening, then clearing. Lows around 50. North wind 5 to 10 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Portland International Airport Temperature Statistics

May Temperature

Portland, Portland International Airport (0.6 miles)

  • Lowest 17 May, 2026

    41.6 °F

  • Average May

    61.6 °F

  • Highest 3 May, 2026

    91.7 °F

Climate (2021–Present)

Portland, Portland International Airport (0.6 miles)

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  • Average Low 2021–2026

    48.4 °F

  • Average 2021–2026

    56.3 °F

  • Average High 2021–2026

    65.5 °F
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