Cowlitz River - Longview Weather Forecast

    • 49
    • 68

    Mostly Sunny

    • 53
    • 77

    Mostly Sunny

    • 53
    • 77

    Partly Sunny

    • 43
    • 64

    Partly Sunny

    • 46
    • 62

    Chance Rain

    • 45
    • 58

    Chance Rain

Today 14 Oct Cowlitz County Lowlands

Sunny. Highs in the upper 60s. Light and variable Winds, becoming light.

Tonight 14 Oct Cowlitz County Lowlands

Mostly clear. Patchy fog. Lows in the upper 40s. Winds light.

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Cowlitz River - Longview Temperature Statistics

October Temperature

Southwest Washington Regional Airport (2.5 miles)

  • Lowest 11 October, 2026

    36 °F

  • Average October

    57.5 °F

  • Highest 4 October, 2026

    79 °F

Climate (2021–2026)

Southwest Washington Regional Airport (2.5 miles)

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  • Average Low 2021–2026

    45.2 °F

  • Average 2021–2026

    53.1 °F

  • Average High 2021–2026

    62.5 °F
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