Brown Island Weather Forecast

    • 46
    • 55

    Becoming Sunny

    • 45
    • 57

    Mostly Sunny

    • 45
    • 57

    Mostly Sunny

    • 47
    • 57

    Chance Rain

    • 46
    • 57

    Mostly Cloudy

    • 46
    • 58

    Partly Sunny

Today 10 Oct San Juan County

Mostly cloudy with a chance of rain in the Morning, then partly sunny with a slight chance of rain late in the morning. Sunny in the afternoon. Highs in the mid to upper 50s. Light wind becoming north 10 to 15 Mph in the afternoon.

Tonight 10 Oct San Juan County

Mostly clear. Lows in the 40s to lower 50s. North wind 10 to 20 Mph.

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  • Temperature Real-Time

Brown Island Temperature Statistics

October Temperature

Friday Harbor Airport (1.2 miles)

  • Lowest 7 October, 2026

    44.1 °F

  • Average October

    54.6 °F

  • Highest 2 October, 2026

    66 °F

Climate (2021–2026)

Friday Harbor Airport (1.2 miles)

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  • Average Low 2021–2026

    44.5 °F

  • Average 2021–2026

    52 °F

  • Average High 2021–2026

    59.7 °F
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