Brown Island Weather Forecast

    • 51
    • 70

    Mostly Cloudy

    • 51
    • 67

    Mostly Cloudy

    • 50
    • 69

    Mostly Sunny

    • 53
    • 74

    Mostly Sunny

    • 53
    • 79

    Mostly Sunny

    • 54
    • 77

    Mostly Sunny

    • 53
    • 79

    Chance Rain

Today 10 Jul San Juan County

Mostly cloudy. Highs in the mid 60s to lower 70s. South wind to 10 Mph.

Tonight 10 Jul San Juan County

Cloudy. Lows in the upper 40s to mid 50s. Southwest wind around 10 Mph. Gusts to 20 Mph after midnight.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Brown Island Temperature Statistics

July Temperature

Friday Harbor Airport (1.2 miles)

  • Lowest 5 July, 2026

    46.9 °F

  • Average July

    58.7 °F

  • Highest 6 July, 2026

    75 °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

    59.7 °F
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