Forest Park Weather Forecast

    • 51
    • 67

    Chance Rain Showers

    • 52
    • 68

    Slight Chance Rain Showers

    • 53
    • 69

    Mostly Cloudy

    • 52
    • 70

    Partly Sunny

    • 55
    • 72

    Partly Sunny

    • 57
    • 80

    Mostly Sunny

    • 56
    • 76

    Partly Sunny

Today 4 Sep West Hills and Chehalem Mountains

Partly sunny with a 20 percent chance of Thunderstorms. Highs in the upper 60s. Winds light.

Tonight 4 Sep West Hills and Chehalem Mountains

Mostly cloudy with a 20 percent chance of Showers. Patchy fog after midnight. Lows in the lower 50s. Light and variable Winds.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Forest Park Temperature Statistics

September Temperature

Portland-Hillsboro Airport (6.8 miles)

  • Lowest 2 September, 2026

    57 °F

  • Average September

    61.7 °F

  • Highest 1 September, 2026

    68.6 °F

Climate (2021–2026)

Portland-Hillsboro Airport (6.8 miles)

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  • Average Low 2021–2026

    43.5 °F

  • Average 2021–2026

    53.8 °F

  • Average High 2021–2026

    64.4 °F
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