San Juan Island - Point Joe Weather Forecast

    • 51
    • 62

    Increasing Clouds

    • 50
    • 59

    Increasing Clouds

    • 52
    • 62

    Mostly Sunny

    • 52
    • 63

    Partly Sunny

    • 50
    • 64

    Partly Sunny

    • 51
    • 62

    Partly Sunny

    • 51
    • 64

    Partly Sunny

Today 6 Sep San Juan County

Sunny. Highs in the mid 60s to lower 70s. Light wind.

Tonight 6 Sep San Juan County

Mostly clear until early morning then becoming mostly cloudy. Lows in the upper 40s to mid 50s. Southwest wind to 10 Mph becoming south with Gusts to 20 Mph after midnight.

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  • Temperature Real-Time

San Juan Island - Point Joe Temperature Statistics

September Temperature

Friday Harbor Airport (3.7 miles)

  • Lowest 3 September, 2026

    48.9 °F

  • Average September

    58.1 °F

  • Highest 3 September, 2026

    66.9 °F

Climate (2021–2026)

Friday Harbor Airport (3.7 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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