Arlington Heights Weather Forecast

    • 56
    • 80

    Mostly Sunny

    • 55
    • 75

    Increasing Clouds

    • 54
    • 74

    Mostly Sunny

    • 54
    • 77

    Mostly Sunny

    • 55
    • 79

    Mostly Sunny

    • 50
    • 69

    Mostly Cloudy

    • 48
    • 65

    Partly Sunny

Today 4 Oct West Hills and Chehalem Mountains

Mostly sunny. Highs in the mid 60s.

Tonight 4 Oct West Hills and Chehalem Mountains

Mostly clear. Lows in the mid 50s. Winds light.

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Arlington Heights Temperature Statistics

October Temperature

Portland, Portland International Airport (6.8 miles)

  • Lowest 1 October, 2026

    53.1 °F

  • Average October

    64.6 °F

  • Highest 1 October, 2026

    79 °F

Climate (2021–2026)

Portland, Portland International Airport (6.8 miles)

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  • Average Low 2021–2026

    48.3 °F

  • Average 2021–2026

    56.3 °F

  • Average High 2021–2026

    65.4 °F
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