Arlington Heights Weather Forecast

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    Rain Showers

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    Rain

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Today 15 Dec West Hills and Chehalem Mountains

A slight chance of Thunderstorms. Rain. Highs in the upper 50s. Southwest wind 15 to 20 Mph. Chance of rain near 100 percent. Rainfall Amounts a tenth to a quarter of an Inch, except higher Amounts possible in Thunderstorms.

Tonight 15 Dec West Hills and Chehalem Mountains

Mostly cloudy. A chance of rain in the Evening, then rain after midnight. Lows in the upper 40s. South wind 10 to 15 Mph. Chance of rain 90 percent. Rainfall Amounts less than a tenth of an inch.

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Arlington Heights Temperature Statistics

December Temperature

Portland, Portland International Airport (6.8 miles)

  • Lowest 1 December, 2025

    33.1 °F

  • Average December

    50.5 °F

  • Highest 10 December, 2025

    62.1 °F

Climate (2020–Present)

Portland, Portland International Airport (6.8 miles)

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  • Average Low 2020–2025

    48.4 °F

  • Average 2020–2025

    56.2 °F

  • Average High 2020–2025

    65.4 °F
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