Brown Island Weather Forecast

    • 53
    • 80

    Patchy Smoke

    • 53
    • 71

    Partly Sunny

    • 52
    • 70

    Mostly Cloudy

    • 51
    • 68

    Chance Rain

    • 50
    • 67

    Mostly Cloudy

    • 51
    • 67

    Mostly Cloudy

Today 25 Aug San Juan County

Sunny. Patchy smoke. Highs in the mid 70s to lower 80s. Light wind.

Tonight 25 Aug San Juan County

Mostly clear. Lows in the 50s. South wind to 10 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Brown Island Temperature Statistics

August Temperature

Friday Harbor Airport (1.2 miles)

  • Lowest 3 August, 2026

    48.9 °F

  • Average August

    60.1 °F

  • Highest 4 August, 2026

    78.1 °F

Climate (2021–2026)

Friday Harbor Airport (1.2 miles)

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  • Average Low 2021–2026

    44.5 °F

  • Average 2021–2026

    51.9 °F

  • Average High 2021–2026

    59.6 °F
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