Cowlitz River - Longview Weather Forecast

    • 31
    • 41

    Increasing Clouds

    • 26
    • 44

    Partly Sunny

    • 27
    • 42

    Mostly Sunny

    • 28
    • 44

    Partly Sunny

    • 30
    • 43

    Mostly Cloudy

    • 32
    • 45

    Mostly Cloudy

    • 34
    • 48

    Partly Sunny

Today 17 Jan Cowlitz County Lowlands

Patchy fog this morning. Mostly sunny. Highs in the lower 40s. Winds light.

Tonight 17 Jan Cowlitz County Lowlands

Mostly clear this Evening, then becoming partly cloudy. Lows around 30. Winds light.

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Cowlitz River - Longview Temperature Statistics

January Temperature

Southwest Washington Regional Airport (2.5 miles)

  • Lowest 13 January, 2025

    28.9 °F

  • Average January

    42.6 °F

  • Highest 8 January, 2025

    54 °F

Climate (2020–Present)

Southwest Washington Regional Airport (2.5 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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