San Juan Island - Kansas Cove Weather Forecast

    • 50
    • 62

    Decreasing Clouds

    • 48
    • 63

    Partly Sunny

    • 48
    • 63

    Mostly Cloudy

    • 48
    • 59

    Mostly Cloudy

    • 48
    • 61

    Partly Sunny

    • 49
    • 62

    Partly Sunny

Today 3 Oct San Juan County

Partly sunny until late afternoon then becoming sunny. Highs in the 60s. North wind to 10 Mph.

Tonight 3 Oct San Juan County

Mostly clear. Lows in the mid 40s to lower 50s. Northwest wind to 10 Mph in the evening becoming light.

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San Juan Island - Kansas Cove Temperature Statistics

October Temperature

Friday Harbor Airport (1.9 miles)

  • Lowest 1 October, 2026

    46 °F

  • Average October

    54.1 °F

  • Highest 1 October, 2026

    60.1 °F

Climate (2021–2026)

Friday Harbor Airport (1.9 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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