Cornelius Weather Forecast

    • 53
    • 82

    Mostly Sunny

    • 57
    • 87

    Mostly Sunny

    • 61
    • 90

    Mostly Cloudy

    • 61
    • 93

    Partly Sunny

    • 59
    • 93

    Partly Sunny

    • 57
    • 91

    Mostly Sunny

Today 18 Jul Tualatin Valley

Sunny. Highs in the mid 80s. North wind 5 to 10 Mph.

Tonight 18 Jul Tualatin Valley

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

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Cornelius Temperature Statistics

July Temperature

Portland-Hillsboro Airport (5 miles)

  • Lowest 2 July, 2026

    44.7 °F

  • Average July

    66.5 °F

  • Highest 6 July, 2026

    89.7 °F

Climate (2021–2026)

Portland-Hillsboro Airport (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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