Arlington Heights Weather Forecast

    • 60
    • 76

    Mostly Cloudy

    • 59
    • 77

    Mostly Cloudy

    • 56
    • 77

    Partly Sunny

    • 58
    • 79

    Mostly Sunny

    • 55
    • 80

    Mostly Sunny

    • 58
    • 84

    Sunny

    • 58
    • 89

    Sunny

Today 16 Aug West Hills and Chehalem Mountains

Mostly sunny. A slight chance of rain this morning. Highs in the upper 70s. West wind 5 to 10 Mph. Chance of rain 20 percent.

Tonight 16 Aug West Hills and Chehalem Mountains

Partly cloudy this Evening, then becoming mostly cloudy. Lows in the upper 50s. Winds light.

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Arlington Heights Temperature Statistics

August Temperature

Portland, Portland International Airport (6.8 miles)

  • Lowest 8 August, 2025

    54.6 °F

  • Average August

    71.6 °F

  • Highest 10 August, 2025

    99.6 °F

Climate (2020–Present)

Portland, Portland International Airport (6.8 miles)

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  • Average Low 2020–2025

    48.3 °F

  • Average 2020–2025

    56.1 °F

  • Average High 2020–2025

    65.3 °F
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