River Meadows Co Park Weather Forecast

    • 51
    • 75

    Increasing Clouds

    • 50
    • 73

    Partly Sunny

    • 50
    • 74

    Mostly Sunny

    • 51
    • 71

    Chance Rain

    • 49
    • 68

    Chance Rain

    • 50
    • 69

    Mostly Cloudy

Today 18 Sep Foothills and Valleys of the North Cascades

Sunny. Highs in the 70s. Light wind.

Tonight 18 Sep Foothills and Valleys of the North Cascades

Mostly clear. Lows in the lower 50s. Light wind.

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River Meadows Co Park Temperature Statistics

September Temperature

Arlington Municipal Airport (3.7 miles)

  • Lowest 16 September, 2026

    44.1 °F

  • Average September

    59.9 °F

  • Highest 9 September, 2026

    78.1 °F

Climate (2021–2026)

Arlington Municipal Airport (3.7 miles)

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  • Average Low 2021–2026

    42.6 °F

  • Average 2021–2026

    50.9 °F

  • Average High 2021–2026

    59.9 °F
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