San Juan Island - Friday Harbor Weather Forecast

    • 39
    • 45

    Mostly Cloudy

    • 39
    • 45

    Cloudy

    • 36
    • 44

    Mostly Cloudy

    • 33
    • 42

    Mostly Sunny

    • 35
    • 41

    Chance Rain

    • 35
    • 42

    Chance Rain

    • 34
    • 42

    Mostly Cloudy

Today 19 Jan San Juan County

Partly sunny. Patchy fog in the morning. Highs in the 40s. South wind to 10 Mph increasing to 10 to 15 Mph with Gusts to 25 Mph in the afternoon.

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San Juan Island - Friday Harbor Temperature Statistics

January Temperature

Friday Harbor Airport (1.9 miles)

  • Lowest 8 January, 2021

    35.1 °F
  • Average January

    44.8 °F
  • Highest 12 January, 2021

    54 °F

Climate (2010–Present)

Friday Harbor Airport (1.9 miles)

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  • Average Low 2010–Present

    44 °F
  • Average 2010–Present

    50.7 °F
  • Average High 2010–Present

    58.3 °F
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