Trump Island Weather Forecast

    • 49
    • 62

    Slight Chance Rain

    • 49
    • 62

    Increasing Clouds

    • 49
    • 63

    Partly Sunny

    • 51
    • 63

    Rain Likely

    • 51
    • 63

    Chance Rain

    • 50
    • 63

    Chance Rain

    • 49
    • 62

    Chance Rain

Today 25 Sep San Juan County

Mostly sunny. Highs in the lower to mid 60s.

Tonight 25 Sep San Juan County

Breezy. Mostly clear. A slight chance of rain in the evening. Lows in the mid 40s to lower 50s. Southwest wind 15 to 25 Mph with Gusts to 35 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Trump Island Temperature Statistics

September Temperature

Friday Harbor Airport (8.7 miles)

  • Lowest 21 September, 2026

    46 °F

  • Average September

    57.6 °F

  • Highest 6 September, 2026

    73 °F

Climate (2021–2026)

Friday Harbor Airport (8.7 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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