San Juan Island - Kansas Cove Weather Forecast

    • 41
    • 49

    Rain

    • 40
    • 52

    Rain

    • 39
    • 49

    Rain Likely

    • 37
    • 50

    Partly Sunny

    • 41
    • 52

    Partly Sunny

    • 43
    • 54

    Mostly Cloudy

Today 23 Mar San Juan County

Mostly sunny. Highs in the mid 40s to lower 50s. Light wind.

Tonight 23 Mar San Juan County

Cloudy. A chance of rain in the morning. Lows near 40. Light wind.

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San Juan Island - Kansas Cove Temperature Statistics

March Temperature

Friday Harbor Airport (1.9 miles)

  • Lowest 10 March, 2026

    30 °F

  • Average March

    44.9 °F

  • Highest 20 March, 2026

    59 °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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