Arlington Heights Weather Forecast

    • 47
    • 66

    Increasing Clouds

    • 47
    • 71

    Partly Sunny

    • 49
    • 70

    Partly Sunny

    • 51
    • 75

    Partly Sunny

    • 51
    • 77

    Mostly Sunny

    • 52
    • 77

    Mostly Sunny

Today 17 May West Hills and Chehalem Mountains

Mostly sunny. Highs in the mid 60s. North wind 5 to 10 Mph.

Tonight 17 May West Hills and Chehalem Mountains

Partly cloudy in the Evening, then becoming mostly cloudy. Lows in the mid 40s. Northwest wind 5 to 10 Mph.

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Arlington Heights Temperature Statistics

May Temperature

Portland, Portland International Airport (6.8 miles)

  • Lowest 15 May, 2026

    45 °F

  • Average May

    63 °F

  • Highest 3 May, 2026

    91.7 °F

Climate (2021–Present)

Portland, Portland International Airport (6.8 miles)

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  • Average Low 2021–2026

    48.4 °F

  • Average 2021–2026

    56.3 °F

  • Average High 2021–2026

    65.5 °F
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