San Juan Island - Smallpox Bay Weather Forecast

    • 33
    • 45

    Rain/Snow Likely

    • 35
    • 46

    Partly Sunny

    • 38
    • 48

    Rain Likely

    • 38
    • 50

    Rain

    • 39
    • 50

    Chance Rain

    • 39
    • 51

    Partly Sunny

Today 29 Mar San Juan County

Rain and snow likely. No snow accumulation. Highs in the 40s. Light wind becoming northwest to 10 Mph in the afternoon.

Tonight 29 Mar San Juan County

Partly cloudy with a slight chance of rain and snow in the Evening, then mostly clear after midnight. Snow level near 500 feet. Lows in the 30s. West wind 10 to 15 Mph becoming northwest after midnight.

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  • Temperature Real-Time

San Juan Island - Smallpox Bay Temperature Statistics

March Temperature

Friday Harbor Airport (6.2 miles)

  • Lowest 10 March, 2026

    30 °F

  • Average March

    44.7 °F

  • Highest 20 March, 2026

    59 °F

Climate (2021–Present)

Friday Harbor Airport (6.2 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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