Wallace Slough - Beaver Slough Entrance Weather Forecast

    • 57
    • 70

    Slight Chance Rain Showers

    • 54
    • 67

    Partly Sunny

    • 55
    • 73

    Mostly Sunny

    • 58
    • 79

    Mostly Sunny

    • 56
    • 71

    Partly Sunny

    • 54
    • 65

    Partly Sunny

    • 55
    • 68

    Partly Sunny

Today 6 Sep Lower Columbia River

Partly sunny. A slight chance of rain Early, then a chance of Showers with a slight chance of Thunderstorms. Highs in the lower 70s. Light and variable Winds, becoming southwest 5 to 10 Mph. Chance of rain 40 percent. Rainfall Amounts less than a tenth of an Inch, except higher Amounts possible in Thunderstorms.

Tonight 6 Sep Lower Columbia River

Partly cloudy with a chance of Showers in the Evening, then mostly cloudy after midnight. Patchy fog after midnight. Lows in the mid 50s. Winds light. Chance of rain 50 percent. Rainfall Amounts less than a tenth of an inch.

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Wallace Slough - Beaver Slough Entrance Temperature Statistics

September Temperature

Southwest Washington Regional Airport (16.2 miles)

  • Lowest 4 September, 2026

    48 °F

  • Average September

    59.3 °F

  • Highest 4 September, 2026

    72 °F

Climate (2021–2026)

Southwest Washington Regional Airport (16.2 miles)

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  • Average Low 2021–2026

    45.2 °F

  • Average 2021–2026

    53.1 °F

  • Average High 2021–2026

    62.4 °F
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