Wallace Slough - Wallace Island Weather Forecast

    • 51
    • 71

    Sunny

    • 53
    • 76

    Mostly Sunny

    • 55
    • 77

    Mostly Sunny

    • 56
    • 76

    Chance Rain

    • 56
    • 73

    Slight Chance Rain

    • 56
    • 75

    Mostly Sunny

    • 58
    • 80

    Mostly Sunny

Today 12 Jul Lower Columbia River

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

Tonight 12 Jul Lower Columbia River

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

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Wallace Slough - Wallace Island Temperature Statistics

July Temperature

Southwest Washington Regional Airport (17.4 miles)

  • Lowest 9 July, 2026

    48.9 °F

  • Average July

    63.8 °F

  • Highest 6 July, 2026

    84.9 °F

Climate (2021–2026)

Southwest Washington Regional Airport (17.4 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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