Stillaguamish River - Stanwood Weather Forecast

    • 52
    • 75

    Becoming Sunny

    • 52
    • 75

    Mostly Sunny

    • 52
    • 74

    Mostly Sunny

    • 51
    • 73

    Partly Sunny

    • 52
    • 73

    Partly Sunny

    • 53
    • 72

    Chance Rain

Today 16 Sep Lowlands of Western Skagit and Northwestern Snohomish Counties

Sunny. Patchy fog in the morning. Highs in the upper 60s to mid 70s. Light wind becoming northwest to 10 Mph in the afternoon.

Tonight 16 Sep Lowlands of Western Skagit and Northwestern Snohomish Counties

Mostly clear. Lows in the upper 40s to mid 50s. Northwest wind to 10 Mph in the evening becoming light.

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Stillaguamish River - Stanwood Temperature Statistics

September Temperature

Arlington Municipal Airport (10.6 miles)

  • Lowest 8 September, 2026

    46 °F

  • Average September

    60.1 °F

  • Highest 9 September, 2026

    78.1 °F

Climate (2021–2026)

Arlington Municipal Airport (10.6 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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