Cowlitz River - Third Avenue Weather Forecast

    • 43
    • 61

    Rain Showers

    • 48
    • 66

    Mostly Cloudy

    • 46
    • 66

    Mostly Cloudy

    • 45
    • 65

    Slight Chance Rain

    • 47
    • 72

    Partly Sunny

    • 50
    • 79

    Chance Rain

    • 52
    • 74

    Chance Rain

Today 20 May Cowlitz County Lowlands

Partly sunny this Morning, then becoming mostly cloudy. A slight chance of Thunderstorms. A chance of Showers this Morning, then Showers this afternoon. Highs in the lower 60s. Winds light. Chance of rain 90 percent. Rainfall Amounts around a tenth of an Inch, except higher Amounts possible in Thunderstorms.

Tonight 20 May Cowlitz County Lowlands

Partly cloudy with a slight chance of Thunderstorms in the Evening, then mostly cloudy after midnight. Lows in the lower 40s. Winds light in the Evening, becoming light and variable. Chance of precipitation 20 percent.

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Cowlitz River - Third Avenue Temperature Statistics

May Temperature

Southwest Washington Regional Airport (1.2 miles)

  • Lowest 4 May, 2025

    35.1 °F

  • Average May

    55.2 °F

  • Highest 1 May, 2025

    84 °F

Climate (2020–Present)

Southwest Washington Regional Airport (1.2 miles)

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  • Average Low 2020–2025

    45 °F

  • Average 2020–2025

    52.7 °F

  • Average High 2020–2025

    62.1 °F
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