Columbia River - Willamette River Entrance Weather Forecast

    • 53
    • 77

    Mostly Sunny

    • 53
    • 80

    Sunny

    • 59
    • 79

    Rain Showers Likely

    • 52
    • 71

    Slight Chance Rain

    • 55
    • 76

    Mostly Sunny

    • 59
    • 80

    Slight Chance Rain

Today 18 Sep Inner Portland Metro

Sunny. Highs in the upper 70s. Northwest wind 5 to 10 Mph.

Tonight 18 Sep Inner Portland Metro

Mostly clear. Lows in the lower 50s. Northwest wind 5 to 10 Mph.

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  • Temperature Real-Time

Columbia River - Willamette River Entrance Temperature Statistics

September Temperature

Pearson Airfield (5.6 miles)

  • Lowest 15 September, 2025

    48 °F

  • Average September

    67.9 °F

  • Highest 2 September, 2025

    90 °F

Climate (2020–Present)

Pearson Airfield (5.6 miles)

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  • Average Low 2020–2025

    46.4 °F

  • Average 2020–2025

    55.2 °F

  • Average High 2020–2025

    64.5 °F
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