Cornelius Weather Forecast

    • 38
    • 50

    Rain

    • 35
    • 47

    Chance Rain

    • 37
    • 46

    Rain

    • 36
    • 45

    Rain

    • 39
    • 47

    Chance Rain

    • 37
    • 49

    Mostly Cloudy

Today 4 Jan Tualatin Valley

A chance of rain this Morning, then rain this afternoon. Highs in the lower 50s. South wind 10 to 15 Mph. Chance of rain near 100 percent. Rainfall Amounts a tenth to a quarter of an inch.

Tonight 4 Jan Tualatin Valley

Mostly cloudy. Rain Showers Likely, mainly this evening. Patchy fog after midnight. Lows in the upper 30s. South wind 5 to 10 Mph. Chance of rain 70 percent. Rainfall Amounts less than a tenth of an inch.

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Cornelius Temperature Statistics

January Temperature

Portland-Hillsboro Airport (5 miles)

  • Lowest 1 January, 2026

    32 °F

  • Average January

    41.4 °F

  • Highest 2 January, 2026

    48 °F

Climate (2021–Present)

Portland-Hillsboro Airport (5 miles)

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  • Average Low 2021–2026

    43.4 °F

  • Average 2021–2026

    53.7 °F

  • Average High 2021–2026

    64.4 °F
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