Cathlamet Weather Forecast

    • 57
    • 74

    Increasing Clouds

    • 58
    • 71

    Mostly Cloudy

    • 56
    • 72

    Mostly Cloudy

    • 57
    • 75

    Mostly Cloudy

    • 58
    • 72

    Chance Rain

    • 57
    • 69

    Chance Rain

Today 17 Aug Willapa and Wahkiakum Lowlands

Mostly cloudy in the Morning, then clearing. Patchy fog in the morning. Highs in the mid 70s. Northwest wind 5 to 10 Mph.

Tonight 17 Aug Willapa and Wahkiakum Lowlands

Mostly cloudy. Patchy fog. Lows in the mid 50s. Winds light.

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Cathlamet Temperature Statistics

August Temperature

Southwest Washington Regional Airport (23.6 miles)

  • Lowest 9 August, 2026

    54 °F

  • Average August

    68.6 °F

  • Highest 5 August, 2026

    93.9 °F

Climate (2021–2026)

Southwest Washington Regional Airport (23.6 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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