Portland-Hillsboro Airport Weather Forecast

    • 50
    • 80

    Rain Likely

    • 46
    • 64

    Rain

    • 45
    • 68

    Mostly Cloudy

    • 42
    • 62

    Chance Rain

    • 41
    • 62

    Chance Rain

    • 45
    • 67

    Partly Sunny

Today 12 May Tualatin Valley

Mostly sunny. Highs in the lower 80s. Winds Light, becoming southwest 5 to 10 Mph this afternoon.

Tonight 12 May Tualatin Valley

Mostly cloudy. A slight chance of Showers in the Evening, then Showers likely after midnight. Lows in the lower 50s. West wind 5 to 10 Mph. Chance of rain 70 percent. Rainfall Amounts less than a tenth of an inch.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Portland-Hillsboro Airport Temperature Statistics

May Temperature

Portland-Hillsboro Airport (0 miles)

  • Lowest 9 May, 2026

    44.7 °F

  • Average May

    61.4 °F

  • Highest 3 May, 2026

    90.6 °F

Climate (2021–Present)

Portland-Hillsboro Airport (0 miles)

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  • Average Low 2021–2026

    43.5 °F

  • Average 2021–2026

    53.9 °F

  • Average High 2021–2026

    64.6 °F
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