Arlington State Park Weather Forecast

    • 63
    • 84

    Mostly Sunny

    • 56
    • 82

    Partly Sunny

    • 56
    • 75

    Partly Sunny

    • 54
    • 70

    Chance Rain Showers

    • 54
    • 71

    Mostly Sunny

    • 56
    • 75

    Mostly Sunny

Today 9 Sep Eastern Columbia River Gorge of Washington

Sunny. Highs in the mid to upper 80s. Light wind.

Tonight 9 Sep Eastern Columbia River Gorge of Washington

Mostly clear. Lows in the mid 50s to lower 60s. Light Wind, becoming west 5 to 10 Mph overnight.

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Arlington State Park Temperature Statistics

September Temperature

Sunnyside Municipal Airport (40.4 miles)

  • Lowest 3 September, 2026

    46.2 °F

  • Average September

    60.4 °F

  • Highest 1 September, 2026

    85.5 °F

Climate (2021–2026)

Sunnyside Municipal Airport (40.4 miles)

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  • Average Low 2021–2026

    38.8 °F

  • Average 2021–2026

    51 °F

  • Average High 2021–2026

    63 °F
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