Portage Creek Wildlife Reserve Weather Forecast

    • 42
    • 62

    Rain Showers

    • 40
    • 64

    Mostly Cloudy

    • 43
    • 66

    Partly Sunny

    • 47
    • 65

    Chance Rain

    • 47
    • 64

    Chance Rain

    • 45
    • 67

    Chance Rain

Today 25 Sep Lowlands of Western Skagit and Northwestern Snohomish Counties

Rain in the Morning, then Showers and a slight chance of Thunderstorms in the afternoon. Rainfall Amounts a quarter to a half inch Possible, except higher Amounts possible in Thunderstorms. Highs in the upper 50s to mid 60s. Southeast wind to 10 Mph increasing to south 10 to 20 Mph in the afternoon.

Tonight 25 Sep Lowlands of Western Skagit and Northwestern Snohomish Counties

Mostly cloudy with a chance of rain until early Morning, then mostly cloudy with a slight chance of rain in the morning. Lows in the mid 40s to lower 50s. Southwest wind 10 to 20 Mph becoming south after midnight. Gusts to 30 Mph.

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Portage Creek Wildlife Reserve Temperature Statistics

September Temperature

Arlington Municipal Airport (1.2 miles)

  • Lowest 16 September, 2026

    44.1 °F

  • Average September

    59.2 °F

  • Highest 9 September, 2026

    78.1 °F

Climate (2021–2026)

Arlington Municipal Airport (1.2 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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