Sunday Lake Weather Forecast

    • 52
    • 72

    Increasing Clouds

    • 51
    • 69

    Mostly Cloudy

    • 52
    • 73

    Mostly Sunny

    • 54
    • 76

    Partly Sunny

    • 53
    • 72

    Mostly Cloudy

    • 51
    • 69

    Partly Sunny

    • 51
    • 71

    Partly Sunny

Today 6 Sep Lowlands of Western Skagit and Northwestern Snohomish Counties

Sunny. Highs in the mid 60s to lower 70s. Light wind becoming northwest to 10 Mph in the afternoon.

Tonight 6 Sep Lowlands of Western Skagit and Northwestern Snohomish Counties

Mostly clear until early morning then becoming mostly cloudy. Lows in the lower to mid 50s. West wind to 10 Mph becoming south after midnight.

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Sunday Lake Temperature Statistics

September Temperature

Arlington Municipal Airport (6.2 miles)

  • Lowest 1 September, 2026

    51.1 °F

  • Average September

    60.6 °F

  • Highest 4 September, 2026

    73 °F

Climate (2021–2026)

Arlington Municipal Airport (6.2 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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