Sunday Lake Weather Forecast

    • 51
    • 73

    Increasing Clouds

    • 49
    • 69

    Becoming Sunny

    • 50
    • 72

    Mostly Sunny

    • 54
    • 71

    Rain

    • 49
    • 67

    Chance Rain

    • 50
    • 70

    Partly Sunny

    • 53
    • 71

    Chance Rain

Today 17 Sep Lowlands of Western Skagit and Northwestern Snohomish Counties

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

Tonight 17 Sep Lowlands of Western Skagit and Northwestern Snohomish Counties

Mostly clear. Lows in the upper 40s to mid 50s. Northwest wind 10 to 15 Mph decreasing to 10 Mph or less after midnight.

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  • Temperature Forecast NOAA

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Sunday Lake Temperature Statistics

September Temperature

Arlington Municipal Airport (6.2 miles)

  • Lowest 9 September, 2025

    51.8 °F

  • Average September

    62.8 °F

  • Highest 3 September, 2025

    81 °F

Climate (2020–Present)

Arlington Municipal Airport (6.2 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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