Arlington Heights Weather Forecast

    • 47
    • 65

    Increasing Clouds

    • 46
    • 63

    Increasing Clouds

    • 47
    • 70

    Mostly Sunny

    • 47
    • 71

    Partly Sunny

    • 44
    • 62

    Slight Chance Rain

    • 43
    • 59

    Mostly Cloudy

    • 44
    • 58

    Chance Rain

Today 18 Oct West Hills and Chehalem Mountains

Partly sunny with a 40 percent chance of rain. Highs in the upper 50s.

Tonight 18 Oct West Hills and Chehalem Mountains

Mostly cloudy. Lows in the mid 40s. Winds light.

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Arlington Heights Temperature Statistics

October Temperature

Portland, Portland International Airport (6.8 miles)

  • Lowest 12 October, 2026

    39.7 °F

  • Average October

    61.9 °F

  • Highest 4 October, 2026

    82.7 °F

Climate (2021–2026)

Portland, Portland International Airport (6.8 miles)

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  • Average Low 2021–2026

    48.4 °F

  • Average 2021–2026

    56.4 °F

  • Average High 2021–2026

    65.5 °F
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