New West Side Weather Forecast

    • 52
    • 70

    Mostly Cloudy

    • 53
    • 69

    Partly Sunny

    • 54
    • 78

    Mostly Sunny

    • 55
    • 83

    Mostly Sunny

    • 56
    • 81

    Mostly Sunny

    • 55
    • 78

    Partly Sunny

Today 14 Sep Cowlitz County Lowlands

Partly sunny. Highs around 70. Winds light.

Tonight 14 Sep Cowlitz County Lowlands

Partly cloudy in the Evening, then becoming mostly cloudy. Patchy fog after midnight. Lows in the lower 50s. Winds light in the Evening, becoming light and variable.

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New West Side Temperature Statistics

September Temperature

Southwest Washington Regional Airport (2.5 miles)

  • Lowest 4 September, 2026

    48 °F

  • Average September

    61.5 °F

  • Highest 9 September, 2026

    86 °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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