New West Side Weather Forecast

    • 54
    • 70

    Cloudy

    • 53
    • 69

    Rain Showers

    • 52
    • 68

    Chance Rain Showers

    • 52
    • 72

    Partly Sunny

    • 55
    • 78

    Mostly Sunny

    • 56
    • 84

    Mostly Sunny

Today 11 Sep Cowlitz County Lowlands

Cloudy in the Morning, then becoming partly sunny. Highs around 70. Winds light.

Tonight 11 Sep Cowlitz County Lowlands

Cloudy. 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

    60.6 °F

  • Highest 8 September, 2026

    80.1 °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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