Columbia River - Wallace Slough Entrance Weather Forecast

    • 45
    • 66

    Increasing Clouds

    • 51
    • 71

    Partly Sunny

    • 47
    • 58

    Rain Showers

    • 48
    • 60

    Rain Showers

    • 48
    • 64

    Partly Sunny

    • 50
    • 65

    Partly Sunny

Today 23 May Lower Columbia River

Mostly sunny. Highs in the mid 70s. Northwest wind 5 to 10 Mph.

Tonight 23 May Lower Columbia River

Partly cloudy. Lows in the mid 40s. Northwest wind 5 to 10 Mph.

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  • Temperature Real-Time

Columbia River - Wallace Slough Entrance Temperature Statistics

May Temperature

Southwest Washington Regional Airport (18.6 miles)

  • Lowest 17 May, 2026

    39.9 °F

  • Average May

    59.1 °F

  • Highest 3 May, 2026

    91 °F

Climate (2021–Present)

Southwest Washington Regional Airport (18.6 miles)

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  • Average Low 2021–2026

    45.2 °F

  • Average 2021–2026

    53.1 °F

  • Average High 2021–2026

    62.5 °F
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