Cowlitz River - Longview Weather Forecast

    • 56
    • 74

    Decreasing Clouds

    • 63
    • 91

    Mostly Sunny

    • 59
    • 94

    Mostly Sunny

    • 57
    • 87

    Mostly Sunny

    • 58
    • 83

    Mostly Sunny

    • 58
    • 79

    Partly Sunny

Today 14 Jul Cowlitz County Lowlands

Mostly sunny. Highs in the upper 70s. West wind 5 to 10 Mph, rising to 10 to 15 Mph this afternoon.

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 5 July, 2025

    48 °F
  • Average July

    66.3 °F
  • Highest 7 July, 2025

    90 °F

Climate (2020–Present)

Southwest Washington Regional Airport (2.5 miles)

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  • Average Low 2020–2025

    45 °F
  • Average 2020–2025

    52.8 °F
  • Average High 2020–2025

    62.3 °F
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