Friday Harbor Weather Forecast

    • 41
    • 53

    Rain Likely

    • 43
    • 55

    Chance Rain

    • 42
    • 54

    Mostly Cloudy

    • 40
    • 54

    Mostly Cloudy

    • 39
    • 53

    Rain

    • 38
    • 52

    Chance Rain

    • 38
    • 51

    Partly Sunny

Today 24 Oct San Juan County

Partly sunny. Highs in the lower 50s.

Tonight 24 Oct San Juan County

Cloudy with a chance of rain until early Morning, then cloudy with rain likely late in the night. Rainfall Amounts less than a tenth of an inch likely. Lows in the 40s. Northeast wind 10 to 15 Mph becoming east after midnight.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Friday Harbor Temperature Statistics

October Temperature

Friday Harbor Airport (0.6 miles)

  • Lowest 12 October, 2026

    41 °F

  • Average October

    52.6 °F

  • Highest 2 October, 2026

    66 °F

Climate (2021–2026)

Friday Harbor Airport (0.6 miles)

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  • Average Low 2021–2026

    44.5 °F

  • Average 2021–2026

    52 °F

  • Average High 2021–2026

    59.7 °F
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