Commonwealth Lake Weather Forecast

    • 57
    • 83

    Decreasing Clouds

    • 57
    • 85

    Mostly Sunny

    • 57
    • 82

    Partly Sunny

    • 55
    • 83

    Mostly Sunny

    • 56
    • 86

    Sunny

    • 58
    • 89

    Mostly Sunny

Today 26 Jul Tualatin Valley

Mostly sunny. Highs in the lower 80s. Winds light.

Tonight 26 Jul Tualatin Valley

Partly cloudy. Lows in the mid 50s. Light and variable Winds.

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  • Temperature Real-Time

Commonwealth Lake Temperature Statistics

July Temperature

Portland-Hillsboro Airport (7.5 miles)

  • Lowest 2 July, 2026

    44.7 °F

  • Average July

    68.1 °F

  • Highest 21 July, 2026

    100.7 °F

Climate (2021–2026)

Portland-Hillsboro Airport (7.5 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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