Arlington Heights Weather Forecast

    • 58
    • 73

    Becoming Sunny

    • 58
    • 87

    Sunny

    • 57
    • 79

    Mostly Sunny

    • 58
    • 77

    Mostly Sunny

    • 59
    • 80

    Mostly Sunny

    • 59
    • 78

    Partly Sunny

Today 15 Sep West Hills and Chehalem Mountains

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

Tonight 15 Sep West Hills and Chehalem Mountains

Mostly clear. Lows in the upper 50s. North wind 5 to 10 Mph.

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Arlington Heights Temperature Statistics

September Temperature

Portland, Portland International Airport (6.8 miles)

  • Lowest 8 September, 2025

    57 °F

  • Average September

    68.7 °F

  • Highest 2 September, 2025

    89.1 °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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