San Juan Island - Friday Harbor Weather Forecast

    • 44
    • 55

    Decreasing Clouds

    • 43
    • 55

    Partly Sunny

    • 44
    • 50

    Chance Rain

    • 45
    • 52

    Chance Rain

    • 43
    • 51

    Rain Likely

    • 41
    • 49

    Rain Likely

    • 41
    • 49

    Chance Rain

Today 18 Mar San Juan County

Mostly sunny. Highs in the mid 50s to lower 60s. North wind 10 to 15 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

San Juan Island - Friday Harbor Temperature Statistics

March Temperature

Friday Harbor Airport (1.9 miles)

  • Lowest 5 March, 2024

    32.6 °F
  • Average March

    46 °F
  • Highest 16 March, 2024

    61 °F

Climate (2019–Present)

Friday Harbor Airport (1.9 miles)

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  • Average Low 2019–2024

    43.9 °F
  • Average 2019–2024

    50.9 °F
  • Average High 2019–2024

    58.5 °F
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