New West Side Weather Forecast

    • 55
    • 78

    Mostly Sunny

    • 58
    • 84

    Mostly Sunny

    • 53
    • 72

    Partly Sunny

    • 52
    • 68

    Mostly Cloudy

    • 53
    • 69

    Partly Sunny

    • 53
    • 73

    Partly Sunny

Today 8 Sep Cowlitz County Lowlands

Sunny. Highs in the upper 70s. North wind 5 to 10 Mph.

Tonight 8 Sep Cowlitz County Lowlands

Mostly clear. Lows in the lower 50s. North wind 5 to 10 Mph.

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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

    59.4 °F

  • Highest 5 September, 2026

    73.9 °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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