Beaver Slough - Anunde Island Weather Forecast

    • 51
    • 64

    Rain Showers

    • 53
    • 70

    Mostly Sunny

    • 56
    • 81

    Mostly Sunny

    • 53
    • 67

    Chance Rain Showers

    • 51
    • 67

    Partly Sunny

    • 54
    • 70

    Partly Sunny

Today 14 Sep Lower Columbia River

Mostly cloudy in the Morning, then becoming mostly sunny. A 50 percent chance of Showers. Highs around 70. Southwest wind 5 to 10 Mph, becoming west in the afternoon. Rainfall Amounts around a tenth of an inch.

Tonight 14 Sep Lower Columbia River

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

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Beaver Slough - Anunde Island Temperature Statistics

September Temperature

Southwest Washington Regional Airport (15.5 miles)

  • Lowest 8 September, 2025

    52 °F

  • Average September

    65.9 °F

  • Highest 2 September, 2025

    88 °F

Climate (2020–Present)

Southwest Washington Regional Airport (15.5 miles)

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  • Average Low 2020–2025

    45.1 °F

  • Average 2020–2025

    52.8 °F

  • Average High 2020–2025

    62.2 °F
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