Columbia River - Trojan Nuclear Plant Weather Forecast

    • 52
    • 68

    Increasing Clouds

    • 50
    • 67

    Gradual Clearing

    • 50
    • 67

    Mostly Cloudy

    • 52
    • 71

    Mostly Cloudy

    • 52
    • 76

    Partly Sunny

    • 53
    • 80

    Mostly Sunny

    • 53
    • 80

    Partly Sunny

Today 29 Jun Lower Columbia River

Partly sunny. Highs in the upper 60s. West wind 5 to 10 Mph.

Tonight 29 Jun Lower Columbia River

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

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Columbia River - Trojan Nuclear Plant Temperature Statistics

June Temperature

Southwest Washington Regional Airport (5 miles)

  • Lowest 1 June, 2026

    44.1 °F

  • Average June

    63.7 °F

  • Highest 14 June, 2026

    93 °F

Climate (2021–2026)

Southwest Washington Regional Airport (5 miles)

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  • Average Low 2021–2026

    45.2 °F

  • Average 2021–2026

    53.1 °F

  • Average High 2021–2026

    62.5 °F
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