Hillsboro Weather Forecast

    • 56
    • 78

    Decreasing Clouds

    • 57
    • 85

    Areas Smoke

    • 55
    • 86

    Partly Sunny

    • 57
    • 85

    Partly Sunny

    • 59
    • 87

    Mostly Cloudy

    • 58
    • 85

    Mostly Cloudy

Today 12 Aug Tualatin Valley

Partly sunny. Highs around 80. Winds light.

Tonight 12 Aug Tualatin Valley

Mostly clear. Lows in the mid 50s. Northwest wind 5 to 10 Mph.

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Hillsboro Temperature Statistics

August Temperature

Portland-Hillsboro Airport (1.9 miles)

  • Lowest 2 August, 2026

    49.6 °F

  • Average August

    70.1 °F

  • Highest 6 August, 2026

    95.6 °F

Climate (2021–2026)

Portland-Hillsboro Airport (1.9 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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