Columbia River - Grassy Island Weather Forecast

    • 48
    • 63

    Decreasing Clouds

    • 51
    • 72

    Mostly Sunny

    • 51
    • 66

    Partly Sunny

    • 47
    • 64

    Partly Sunny

    • 49
    • 64

    Rain Likely

    • 46
    • 56

    Rain Likely

    • 48
    • 60

    Chance Rain

Today 20 May Clatsop County Coast

Mostly sunny. Highs in the lower 60s. Northwest wind 5 to 10 Mph.

Tonight 20 May Clatsop County Coast

Mostly cloudy in the Evening, then becoming partly cloudy. Patchy fog after midnight. Lows in the upper 40s. Northwest wind 5 to 10 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Columbia River - Grassy Island Temperature Statistics

May Temperature

Astoria, Astoria Regional Airport (18.6 miles)

  • Lowest 17 May, 2026

    40.6 °F

  • Average May

    55.6 °F

  • Highest 3 May, 2026

    82.7 °F

Climate (2021–Present)

Astoria, Astoria Regional Airport (18.6 miles)

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  • Average Low 2021–2026

    46 °F

  • Average 2021–2026

    52.6 °F

  • Average High 2021–2026

    59.8 °F
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