Hillsboro Weather Forecast

    • 43
    • 75

    Mostly Sunny

    • 36
    • 66

    Partly Sunny

    • 37
    • 61

    Mostly Sunny

    • 40
    • 61

    Chance Rain

    • 40
    • 63

    Chance Rain

    • 38
    • 63

    Partly Sunny

Today 21 Oct Tualatin Valley

Sunny. Highs in the mid 70s. Light and variable Winds.

Tonight 21 Oct Tualatin Valley

Mostly clear. Lows in the mid 40s. Light and variable Winds, becoming light after midnight.

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Hillsboro Temperature Statistics

October Temperature

Portland-Hillsboro Airport (1.9 miles)

  • Lowest 12 October, 2026

    33.7 °F

  • Average October

    59 °F

  • Highest 4 October, 2026

    83.6 °F

Climate (2021–2026)

Portland-Hillsboro Airport (1.9 miles)

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  • Average Low 2021–2026

    43.5 °F

  • Average 2021–2026

    53.9 °F

  • Average High 2021–2026

    64.5 °F
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