New West Side Weather Forecast

    • 54
    • 72

    Chance Rain Showers

    • 55
    • 73

    Mostly Cloudy

    • 54
    • 72

    Mostly Cloudy

    • 56
    • 75

    Mostly Cloudy

    • 59
    • 83

    Partly Sunny

    • 58
    • 78

    Chance Rain

Today 5 Sep Cowlitz County Lowlands

Partly sunny. Patchy fog in the morning. A chance of Showers with a slight chance of Thunderstorms in the afternoon. Highs in the lower 70s. Light and variable Winds, becoming light in the afternoon. Chance of rain 40 percent. Rainfall Amounts less than a tenth of an Inch, except higher Amounts possible in Thunderstorms.

Tonight 5 Sep Cowlitz County Lowlands

Mostly cloudy. A slight chance of Showers in the evening. Patchy fog after midnight. Lows in the lower 50s. Light and variable Winds. Chance of rain 20 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

New West Side Temperature Statistics

September Temperature

Southwest Washington Regional Airport (2.5 miles)

  • Lowest 1 September, 2026

    57 °F

  • Average September

    61.1 °F

  • Highest 1 September, 2026

    66 °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

    62.5 °F
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