New West Side Weather Forecast

    • 53
    • 79

    Increasing Clouds

    • 54
    • 76

    Mostly Cloudy

    • 51
    • 73

    Mostly Cloudy

    • 50
    • 71

    Mostly Cloudy

    • 51
    • 68

    Mostly Cloudy

    • 49
    • 66

    Mostly Cloudy

Today 20 Sep Cowlitz County Lowlands

Partly sunny in the Morning, then clearing. Patchy fog in the morning. Highs around 80. Winds light.

Tonight 20 Sep Cowlitz County Lowlands

Clear in the Evening, then becoming partly cloudy. Patchy fog after midnight. Lows in the lower 50s. Winds light.

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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

    61.3 °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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