Arch Cape Weather Forecast

    • 51
    • 58

    Rain

    • 51
    • 57

    Mostly Cloudy

    • 53
    • 58

    Partly Sunny

    • 53
    • 56

    Chance Rain

    • 54
    • 57

    Chance Rain

    • 53
    • 58

    Mostly Cloudy

Today 25 Sep Clatsop County Coast

Partly sunny with a chance of Showers with a slight chance of Thunderstorms. Highs around 60. West wind 15 to 20 Mph. Chance of rain 50 percent. Rainfall Amounts less than a tenth of an Inch, except higher Amounts possible in Thunderstorms.

Tonight 25 Sep Clatsop County Coast

Partly cloudy in the Evening, then becoming mostly cloudy. Patchy fog after midnight. Lows in the upper 40s. West wind 5 to 10 Mph, becoming light after midnight.

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Arch Cape Temperature Statistics

September Temperature

Astoria, Astoria Regional Airport (23.6 miles)

  • Lowest 16 September, 2026

    45.6 °F

  • Average September

    60 °F

  • Highest 9 September, 2026

    77.6 °F

Climate (2021–2026)

Astoria, Astoria Regional Airport (23.6 miles)

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  • Average Low 2021–2026

    46.1 °F

  • Average 2021–2026

    52.7 °F

  • Average High 2021–2026

    59.9 °F
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