Falls Lake Weather Forecast

    • 53
    • 58

    Becoming Sunny

    • 56
    • 71

    Sunny

    • 53
    • 65

    Mostly Sunny

    • 55
    • 64

    Mostly Sunny

    • 56
    • 69

    Mostly Sunny

    • 53
    • 64

    Chance Rain

Today 15 Sep Cascades of Whatcom and Skagit Counties

Partly sunny until late afternoon then becoming sunny. Patchy fog in the morning. Freezing level near 12000 feet.

Tonight 15 Sep Cascades of Whatcom and Skagit Counties

Mostly clear. Haze after midnight. Freezing level near 14500 feet.

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Falls Lake Temperature Statistics

September Temperature

Arlington Municipal Airport (40.4 miles)

  • Lowest 9 September, 2025

    51.8 °F

  • Average September

    63.4 °F

  • Highest 3 September, 2025

    81 °F

Climate (2020–Present)

Arlington Municipal Airport (40.4 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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