West Longview Weather Forecast

    • 50
    • 63

    Rain Likely

    • 49
    • 67

    Mostly Cloudy

    • 53
    • 71

    Mostly Cloudy

    • 51
    • 71

    Mostly Cloudy

    • 53
    • 73

    Partly Sunny

    • 53
    • 76

    Partly Sunny

Today 29 Sep Cowlitz County Lowlands

Mostly cloudy with a 50 percent chance of rain. Highs in the lower 60s. South wind 5 to 10 Mph. Rainfall Amounts less than a tenth of an inch.

Tonight 29 Sep Cowlitz County Lowlands

Mostly cloudy with a chance of rain in the Evening, then partly cloudy after midnight. Areas of fog in the Evening, then patchy fog after midnight. Lows in the upper 40s. Winds light. Chance of rain 50 percent. Rainfall Amounts less than a tenth of an inch.

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West Longview Temperature Statistics

September Temperature

Southwest Washington Regional Airport (6.2 miles)

  • Lowest 26 September, 2026

    45 °F

  • Average September

    60.5 °F

  • Highest 9 September, 2026

    86 °F

Climate (2021–2026)

Southwest Washington Regional Airport (6.2 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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