Cowlitz River - Longview Weather Forecast

    • 56
    • 88

    Increasing Clouds

    • 57
    • 85

    Rain Showers

    • 55
    • 75

    Rain Showers

    • 56
    • 80

    Partly Sunny

    • 57
    • 83

    Mostly Sunny

    • 59
    • 88

    Mostly Sunny

    • 61
    • 91

    Partly Sunny

Today 14 Jul Cowlitz County Lowlands

Sunny. Highs around 90. Northwest wind 5 to 10 Mph.

Tonight 14 Jul Cowlitz County Lowlands

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

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Cowlitz River - Longview Temperature Statistics

July Temperature

Southwest Washington Regional Airport (2.5 miles)

  • Lowest 9 July, 2026

    48.9 °F

  • Average July

    63.8 °F

  • Highest 6 July, 2026

    84.9 °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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