Longview Weather Forecast

    • 58
    • 82

    Increasing Clouds

    • 58
    • 80

    Mostly Cloudy

    • 58
    • 79

    Mostly Cloudy

    • 60
    • 84

    Partly Sunny

    • 59
    • 79

    Mostly Cloudy

    • 58
    • 73

    Mostly Cloudy

    • 58
    • 77

    Partly Sunny

Today 17 Aug Cowlitz County Lowlands

Sunny. Highs in the lower 80s. Northwest wind 5 to 10 Mph.

Tonight 17 Aug Cowlitz County Lowlands

Mostly clear this Evening, then becoming mostly cloudy. Patchy fog after midnight. Lows in the mid 50s. Northwest wind 5 to 10 Mph.

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Longview Temperature Statistics

August Temperature

Southwest Washington Regional Airport (2.5 miles)

  • Lowest 9 August, 2026

    54 °F

  • Average August

    68.3 °F

  • Highest 5 August, 2026

    93.9 °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

    62.4 °F
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