Brown Island Weather Forecast

    • 46
    • 65

    Decreasing Clouds

    • 46
    • 60

    Rain Likely

    • 47
    • 61

    Rain Likely

    • 46
    • 61

    Rain

    • 43
    • 61

    Rain Likely

    • 43
    • 58

    Chance Rain

    • 43
    • 60

    Slight Chance Rain

Today 7 Oct San Juan County

Partly sunny. Highs in the 60s. Light wind.

Tonight 7 Oct San Juan County

Mostly cloudy then becoming partly cloudy in the late evening and early morning then becoming mostly cloudy. A slight chance of rain late in the night. Lows in the mid 40s to lower 50s. Northwest wind to 10 Mph becoming west after midnight.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Brown Island Temperature Statistics

October Temperature

Friday Harbor Airport (1.2 miles)

  • Lowest 5 October, 2025

    44.1 °F

  • Average October

    55 °F

  • Highest 5 October, 2025

    64.9 °F

Climate (2020–Present)

Friday Harbor Airport (1.2 miles)

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  • Average Low 2020–2025

    44.3 °F

  • Average 2020–2025

    51.7 °F

  • Average High 2020–2025

    59.6 °F
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