Sylvan - Highlands - Southwest Hills Weather Forecast

    • 54
    • 72

    Increasing Clouds

    • 51
    • 70

    Partly Sunny

    • 53
    • 68

    Mostly Cloudy

    • 52
    • 65

    Rain Likely

    • 48
    • 61

    Chance Rain

    • 48
    • 65

    Mostly Cloudy

Today 21 Sep West Hills and Chehalem Mountains

Patchy fog this morning. Partly sunny. Highs in the lower 70s. Light and variable Winds, becoming light this afternoon.

Tonight 21 Sep West Hills and Chehalem Mountains

Partly cloudy in the Evening, then becoming mostly cloudy. Lows in the lower 50s. Winds light.

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Sylvan - Highlands - Southwest Hills Temperature Statistics

September Temperature

Portland, Portland International Airport (8.1 miles)

  • Lowest 8 September, 2026

    51.7 °F

  • Average September

    64.7 °F

  • Highest 9 September, 2026

    88.6 °F

Climate (2021–2026)

Portland, Portland International Airport (8.1 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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