Columbia River - Trojan Nuclear Plant Weather Forecast

    • 51
    • 78

    Decreasing Clouds

    • 56
    • 82

    Mostly Sunny

    • 56
    • 87

    Mostly Sunny

    • 60
    • 88

    Partly Sunny

    • 57
    • 79

    Mostly Cloudy

    • 57
    • 81

    Mostly Sunny

Today 5 Jul Lower Columbia River

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

Tonight 5 Jul Lower Columbia River

Mostly clear. Lows in the lower 50s. Northwest wind 5 to 10 Mph.

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Columbia River - Trojan Nuclear Plant Temperature Statistics

July Temperature

Southwest Washington Regional Airport (5 miles)

  • Lowest 2 July, 2025

    55.9 °F

  • Average July

    64.8 °F

  • Highest 1 July, 2025

    80.1 °F

Climate (2020–Present)

Southwest Washington Regional Airport (5 miles)

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  • Average Low 2020–2025

    45 °F

  • Average 2020–2025

    52.7 °F

  • Average High 2020–2025

    62.2 °F
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