Lake Armstrong Weather Forecast

    • 49
    • 77

    Increasing Clouds

    • 42
    • 63

    Chance Rain Showers

    • 41
    • 62

    Partly Sunny

    • 46
    • 69

    Mostly Cloudy

    • 47
    • 68

    Mostly Cloudy

    • 44
    • 63

    Rain Showers Likely

Today 6 May Lowlands of Western Skagit and Northwestern Snohomish Counties

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

Tonight 6 May Lowlands of Western Skagit and Northwestern Snohomish Counties

Partly cloudy. Lows near 50. West wind to 10 Mph in the evening becoming light.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Lake Armstrong Temperature Statistics

May Temperature

Arlington Municipal Airport (4.3 miles)

  • Lowest 1 May, 2025

    37.9 °F

  • Average May

    53.7 °F

  • Highest 2 May, 2025

    73 °F

Climate (2020–Present)

Arlington Municipal Airport (4.3 miles)

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  • Average Low 2020–2025

    42.4 °F

  • Average 2020–2025

    50.5 °F

  • Average High 2020–2025

    59.5 °F
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