McNary Lake Weather Forecast

    • 44
    • 64

    Rain Showers

    • 43
    • 62

    Rain Showers Likely

    • 47
    • 67

    Chance Rain Showers

    • 46
    • 69

    Mostly Cloudy

    • 46
    • 68

    Chance Rain Showers

    • 47
    • 68

    Chance Rain Showers

Today 19 May Lower Columbia River

Showers this Morning, then partly sunny with a chance of Showers this afternoon. Highs in the mid 60s. South wind 5 to 10 Mph, becoming west this afternoon. Chance of rain near 100 percent. Rainfall Amounts a tenth to a quarter of an inch.

Tonight 19 May Lower Columbia River

Mostly cloudy with a 50 percent chance of Showers. Lows in the mid 40s. Southwest wind 5 to 10 Mph, becoming light after midnight. Rainfall Amounts less than a tenth of an inch.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

McNary Lake Temperature Statistics

May Temperature

Scappoose Industrial Airpark (3.1 miles)

  • Lowest 4 May, 2025

    35.7 °F

  • Average May

    55.7 °F

  • Highest 1 May, 2025

    81.6 °F

Climate (2020–Present)

Scappoose Industrial Airpark (3.1 miles)

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  • Average Low 2020–2025

    43.9 °F

  • Average 2020–2025

    53.2 °F

  • Average High 2020–2025

    63.1 °F
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