Knappa Slough - Knappa Weather Forecast

    • 59
    • 68

    Increasing Clouds

    • 56
    • 69

    Mostly Cloudy

    • 57
    • 73

    Mostly Cloudy

    • 58
    • 68

    Slight Chance Rain

    • 58
    • 63

    Mostly Cloudy

    • 56
    • 66

    Partly Sunny

    • 56
    • 69

    Partly Sunny

Today 18 Aug North Oregon Coast Range Lowlands

Mostly sunny. Highs in the upper 70s. Northwest wind 5 to 10 Mph.

Tonight 18 Aug North Oregon Coast Range Lowlands

Partly cloudy this Evening, then becoming mostly cloudy. Patchy fog after midnight. Lows in the mid 50s. Winds light.

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Knappa Slough - Knappa Temperature Statistics

August Temperature

Astoria, Astoria Regional Airport (13.7 miles)

  • Lowest 3 August, 2026

    48.7 °F

  • Average August

    63.4 °F

  • Highest 5 August, 2026

    82.7 °F

Climate (2021–2026)

Astoria, Astoria Regional Airport (13.7 miles)

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  • Average Low 2021–2026

    46 °F

  • Average 2021–2026

    52.7 °F

  • Average High 2021–2026

    59.9 °F
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