Arlington Heights Weather Forecast

    • 49
    • 62

    Chance Rain Showers

    • 42
    • 61

    Chance Rain Showers

    • 50
    • 63

    Rain

    • 47
    • 57

    Rain

    • 44
    • 58

    Slight Chance Rain

    • 45
    • 58

    Chance Rain

Today 16 Oct West Hills and Chehalem Mountains

Sunny this Morning, then becoming partly sunny. Highs in the lower 60s. Light and variable Winds.

Tonight 16 Oct West Hills and Chehalem Mountains

Mostly cloudy. A slight chance of Showers after midnight. Lows in the upper 40s. Light and variable Winds, becoming light after midnight. Chance of rain 20 percent.

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Arlington Heights Temperature Statistics

October Temperature

Portland, Portland International Airport (6.8 miles)

  • Lowest 13 October, 2025

    42.1 °F

  • Average October

    57.5 °F

  • Highest 7 October, 2025

    79 °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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