Columbia River - Kalama River Entrance Weather Forecast

    • 59
    • 79

    Rain Showers

    • 50
    • 69

    Rain Showers

    • 54
    • 75

    Mostly Sunny

    • 55
    • 87

    Mostly Sunny

    • 52
    • 74

    Chance Rain Showers

    • 51
    • 73

    Partly Sunny

    • 52
    • 75

    Partly Sunny

Today 13 Sep Cowlitz County Lowlands

Partly sunny this Morning, then clearing. Highs in the upper 70s. Winds light.

Tonight 13 Sep Cowlitz County Lowlands

Mostly cloudy. Showers with a slight chance of Thunderstorms after midnight. Lows in the upper 50s. Winds light. Chance of rain 90 percent. Rainfall Amounts around a tenth of an Inch, except higher Amounts possible in Thunderstorms.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Columbia River - Kalama River Entrance Temperature Statistics

September Temperature

Southwest Washington Regional Airport (5.6 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 (5.6 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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