Boulder Lake Weather Forecast

    • 42
    • 55

    Decreasing Clouds

    • 49
    • 60

    Mostly Sunny

    • 51
    • 67

    Mostly Sunny

    • 52
    • 66

    Mostly Sunny

    • 48
    • 54

    Chance Rain Showers

    • 48
    • 59

    Mostly Sunny

    • 54
    • 69

    Mostly Sunny

Today 5 Jul Cascades of Whatcom and Skagit Counties

Mostly sunny. Freezing level near 11500 feet.

Tonight 5 Jul Cascades of Whatcom and Skagit Counties

Mostly cloudy in the evening then becoming partly cloudy. Freezing level near 11500 feet.

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Boulder Lake Temperature Statistics

July Temperature

Arlington Municipal Airport (39.8 miles)

  • Lowest 3 July, 2025

    53.1 °F

  • Average July

    62.6 °F

  • Highest 1 July, 2025

    79 °F

Climate (2020–Present)

Arlington Municipal Airport (39.8 miles)

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  • Average Low 2020–2025

    42.3 °F

  • Average 2020–2025

    50.5 °F

  • Average High 2020–2025

    59.6 °F
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