Arlington Weather Forecast

    • 56
    • 87

    Sunny

    • 50
    • 76

    Mostly Sunny

    • 52
    • 73

    Partly Sunny

    • 52
    • 75

    Mostly Sunny

    • 53
    • 70

    Chance Rain

    • 51
    • 69

    Chance Rain

    • 51
    • 71

    Chance Rain

Today 16 Sep Lowlands of Western Skagit and Northwestern Snohomish Counties

Sunny. Areas of smoke late in the afternoon. Highs in the mid 70s to lower 80s. Light wind becoming southeast to 10 Mph in the afternoon.

Tonight 16 Sep Lowlands of Western Skagit and Northwestern Snohomish Counties

Clear. Areas of smoke. Lows in the 50s. East wind 10 to 15 Mph becoming southeast after midnight. Gusts to 25 Mph.

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Arlington Temperature Statistics

September Temperature

Arlington Municipal Airport (3.1 miles)

  • Lowest 9 September, 2025

    51.8 °F

  • Average September

    63.1 °F

  • Highest 3 September, 2025

    81 °F

Climate (2020–Present)

Arlington Municipal Airport (3.1 miles)

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  • Average Low 2020–2025

    42.4 °F

  • Average 2020–2025

    50.6 °F

  • Average High 2020–2025

    59.7 °F
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