San Juan Island - Point Joe Weather Forecast

    • 50
    • 64

    Rain Showers

    • 50
    • 62

    Rain Showers

    • 50
    • 63

    Mostly Sunny

    • 51
    • 66

    Mostly Sunny

    • 49
    • 63

    Chance Rain Showers

    • 49
    • 62

    Slight Chance Rain Showers

Today 13 Sep San Juan County

Mostly cloudy in the morning then becoming mostly sunny. Areas of fog until late afternoon. Highs in the mid 60s to lower 70s. Light wind.

Tonight 13 Sep San Juan County

Mostly cloudy. A slight chance of Showers after midnight. A chance of Showers in the morning. Lows in the 50s. Light wind.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

San Juan Island - Point Joe Temperature Statistics

September Temperature

Friday Harbor Airport (3.7 miles)

  • Lowest 10 September, 2025

    48 °F

  • Average September

    58.1 °F

  • Highest 3 September, 2025

    75.9 °F

Climate (2020–Present)

Friday Harbor Airport (3.7 miles)

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  • Average Low 2020–2025

    44.3 °F

  • Average 2020–2025

    51.7 °F

  • Average High 2020–2025

    59.5 °F
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