Portland-Hillsboro Airport Weather Forecast

    • 49
    • 56

    Rain

    • 52
    • 60

    Rain

    • 47
    • 58

    Rain Likely

    • 44
    • 58

    Mostly Cloudy

    • 44
    • 55

    Rain Likely

    • 44
    • 54

    Rain Likely

Today 9 Dec Tualatin Valley

Rain. Highs in the upper 50s. Winds Light, becoming south 5 to 10 Mph this afternoon. Chance of rain near 100 percent. Rainfall Amounts a half of an inch to one inch.

Tonight 9 Dec Tualatin Valley

Rain. Lows around 50. South wind 10 to 15 Mph. Chance of rain near 100 percent. Rainfall Amounts a quarter to a half of an inch.

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Portland-Hillsboro Airport Temperature Statistics

December Temperature

Portland-Hillsboro Airport (0 miles)

  • Lowest 1 December, 2025

    30 °F

  • Average December

    44.9 °F

  • Highest 5 December, 2025

    59 °F

Climate (2020–Present)

Portland-Hillsboro Airport (0 miles)

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  • Average Low 2020–2025

    43.3 °F

  • Average 2020–2025

    53.7 °F

  • Average High 2020–2025

    64.4 °F
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