Irvine Slough Weather Forecast

    • 62
    • 88

    Patchy Smoke

    • 64
    • 88

    Mostly Sunny

    • 61
    • 79

    Slight Chance Rain Showers

    • 59
    • 77

    Partly Sunny

    • 58
    • 75

    Mostly Cloudy

    • 57
    • 76

    Mostly Cloudy

Today 21 Jul Lowlands of Western Skagit and Northwestern Snohomish Counties

Partly sunny. Highs in the upper 70s to mid 80s. Light wind becoming west to 10 Mph in the afternoon.

Tonight 21 Jul Lowlands of Western Skagit and Northwestern Snohomish Counties

Partly cloudy. Lows in the mid 50s to lower 60s. West wind to 10 Mph in the evening becoming light.

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Irvine Slough Temperature Statistics

July Temperature

Arlington Municipal Airport (10.6 miles)

  • Lowest 13 July, 2026

    44.6 °F

  • Average July

    62.1 °F

  • Highest 6 July, 2026

    81 °F

Climate (2021–2026)

Arlington Municipal Airport (10.6 miles)

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  • Average Low 2021–2026

    42.6 °F

  • Average 2021–2026

    50.9 °F

  • Average High 2021–2026

    59.9 °F
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