Arlington Heights Weather Forecast

    • 54
    • 69

    Chance Rain Showers

    • 54
    • 70

    Partly Sunny

    • 57
    • 78

    Mostly Sunny

    • 58
    • 84

    Mostly Sunny

    • 55
    • 79

    Partly Sunny

    • 55
    • 70

    Partly Sunny

    • 56
    • 71

    Partly Sunny

Today 6 Sep West Hills and Chehalem Mountains

Partly sunny with a chance of Showers with a slight chance of Thunderstorms. Highs in the upper 60s. Winds light. Chance of rain 40 percent. Rainfall Amounts less than a tenth of an Inch, except higher Amounts possible in Thunderstorms.

Tonight 6 Sep West Hills and Chehalem Mountains

Partly cloudy. A chance of Showers in the evening. Patchy fog after midnight. Lows around 50. Winds light in the Evening, becoming light and variable. Chance of rain 50 percent. Rainfall Amounts around a tenth of an inch.

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Arlington Heights Temperature Statistics

September Temperature

Portland, Portland International Airport (6.8 miles)

  • Lowest 4 September, 2026

    55 °F

  • Average September

    62.4 °F

  • Highest 1 September, 2026

    72.6 °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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