Cathlamet Weather Forecast

    • 62
    • 81

    Mostly Sunny

    • 65
    • 91

    Mostly Sunny

    • 67
    • 92

    Mostly Sunny

    • 61
    • 83

    Partly Sunny

    • 58
    • 71

    Mostly Cloudy

    • 56
    • 70

    Mostly Cloudy

    • 58
    • 70

    Mostly Cloudy

Today 9 Aug Willapa and Wahkiakum Lowlands

Patchy fog this morning. Mostly sunny. Highs in the upper 70s. Northwest wind 5 to 10 Mph.

Tonight 9 Aug Willapa and Wahkiakum Lowlands

Mostly clear. Lows in the upper 50s. Northwest wind 5 to 10 Mph.

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Cathlamet Temperature Statistics

August Temperature

Southwest Washington Regional Airport (23.6 miles)

  • Lowest 3 August, 2025

    55 °F

  • Average August

    65.1 °F

  • Highest 1 August, 2025

    82 °F

Climate (2020–Present)

Southwest Washington Regional Airport (23.6 miles)

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  • Average Low 2020–2025

    45 °F

  • Average 2020–2025

    52.8 °F

  • Average High 2020–2025

    62.2 °F
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