Hillsboro Weather Forecast

    • 62
    • 74

    Rain

    • 58
    • 79

    Chance Rain

    • 57
    • 78

    Mostly Cloudy

    • 55
    • 78

    Partly Sunny

    • 56
    • 82

    Mostly Sunny

    • 57
    • 84

    Sunny

    • 57
    • 86

    Sunny

Today 15 Aug Tualatin Valley

Mostly cloudy. A chance of Showers this Morning, then a chance of rain this afternoon. Highs in the mid 70s. South wind 5 to 10 Mph. Chance of rain 50 percent. Rainfall Amounts less than a tenth of an inch.

Tonight 15 Aug Tualatin Valley

Rain. Lows in the lower 60s. South wind 5 to 10 Mph. Chance of rain near 100 percent. Rainfall Amounts a quarter to a half of an inch.

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Hillsboro Temperature Statistics

August Temperature

Portland-Hillsboro Airport (1.9 miles)

  • Lowest 8 August, 2025

    47.6 °F

  • Average August

    71.1 °F

  • Highest 10 August, 2025

    100.7 °F

Climate (2020–Present)

Portland-Hillsboro Airport (1.9 miles)

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  • Average Low 2020–2025

    43.2 °F

  • Average 2020–2025

    53.5 °F

  • Average High 2020–2025

    64.3 °F
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