Big Lake Weather Forecast

    • 52
    • 68

    Becoming Sunny

    • 57
    • 83

    Mostly Sunny

    • 52
    • 73

    Mostly Sunny

    • 52
    • 71

    Mostly Sunny

    • 55
    • 74

    Mostly Sunny

    • 54
    • 73

    Chance Rain

Today 15 Sep Lowlands of Western Skagit and Northwestern Snohomish Counties

Partly sunny in the morning then becoming sunny. Patchy dense fog in the morning. Highs in the 60s to lower 70s. Light wind becoming northwest to 10 Mph in the afternoon.

Tonight 15 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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Big Lake Temperature Statistics

September Temperature

Burlington/Mount Vernon, Skagit Regional Airport (9.3 miles)

  • Lowest 1 September, 2025

    51.8 °F

  • Average September

    61.2 °F

  • Highest 3 September, 2025

    78.8 °F

Climate (2020–Present)

Burlington/Mount Vernon, Skagit Regional Airport (9.3 miles)

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  • Average Low 2020–2025

    43.7 °F

  • Average 2020–2025

    51.3 °F

  • Average High 2020–2025

    59.7 °F
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