Cornelius Weather Forecast

    • 51
    • 80

    Increasing Clouds

    • 57
    • 85

    Mostly Cloudy

    • 51
    • 89

    Mostly Sunny

    • 50
    • 79

    Mostly Sunny

    • 56
    • 86

    Mostly Sunny

    • 61
    • 94

    Mostly Sunny

Today 17 Jun Tualatin Valley

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

Tonight 17 Jun Tualatin Valley

Mostly clear in the Evening, then becoming partly cloudy. Lows in the lower 50s. Northwest wind 5 to 10 Mph.

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Cornelius Temperature Statistics

June Temperature

Portland-Hillsboro Airport (5 miles)

  • Lowest 10 June, 2026

    46.4 °F

  • Average June

    64.3 °F

  • Highest 14 June, 2026

    91.4 °F

Climate (2021–2026)

Portland-Hillsboro Airport (5 miles)

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  • Average Low 2021–2026

    43.5 °F

  • Average 2021–2026

    53.9 °F

  • Average High 2021–2026

    64.6 °F
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