Longview Weather Forecast

    • 53
    • 76

    Becoming Sunny

    • 52
    • 79

    Mostly Sunny

    • 58
    • 76

    Rain Likely

    • 52
    • 70

    Chance Rain

    • 54
    • 75

    Mostly Sunny

    • 58
    • 78

    Chance Rain

Today 18 Sep Cowlitz County Lowlands

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

Tonight 18 Sep Cowlitz County Lowlands

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

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  • Temperature Forecast NOAA

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Longview Temperature Statistics

September Temperature

Southwest Washington Regional Airport (2.5 miles)

  • Lowest 15 September, 2025

    45 °F

  • Average September

    65.5 °F

  • Highest 16 September, 2025

    91.9 °F

Climate (2020–Present)

Southwest Washington Regional Airport (2.5 miles)

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  • Average Low 2020–2025

    45 °F

  • Average 2020–2025

    52.8 °F

  • Average High 2020–2025

    62.3 °F
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