San Juan Island - Kansas Cove Weather Forecast

    • 48
    • 65

    Increasing Clouds

    • 48
    • 65

    Partly Sunny

    • 49
    • 68

    Partly Sunny

    • 48
    • 70

    Partly Sunny

    • 50
    • 69

    Partly Sunny

    • 51
    • 71

    Partly Sunny

    • 50
    • 71

    Mostly Sunny

Today 7 May San Juan County

Partly sunny. Highs in the upper 50s to mid 60s. Light wind.

Tonight 7 May San Juan County

Mostly cloudy. Lows near 50. Light wind.

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San Juan Island - Kansas Cove Temperature Statistics

May Temperature

Friday Harbor Airport (1.9 miles)

  • Lowest 1 May, 2026

    45 °F

  • Average May

    58.5 °F

  • Highest 3 May, 2026

    75.9 °F

Climate (2021–Present)

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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