Decatur Island - Davis Bay Weather Forecast

    • 48
    • 56

    Mostly Cloudy

    • 48
    • 55

    Gradual Clearing

    • 46
    • 53

    Partly Sunny

    • 46
    • 51

    Rain Likely

    • 47
    • 55

    Chance Rain

    • 46
    • 54

    Mostly Cloudy

    • 45
    • 53

    Chance Rain

Today 21 Oct San Juan County

Mostly sunny. A slight chance of rain in the morning. Highs in the lower to mid 50s.

Tonight 21 Oct San Juan County

Mostly cloudy. Lows in the 40s. Light wind.

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Decatur Island - Davis Bay Temperature Statistics

October Temperature

Friday Harbor Airport (9.9 miles)

  • Lowest 12 October, 2026

    41 °F

  • Average October

    53.1 °F

  • Highest 2 October, 2026

    66 °F

Climate (2021–2026)

Friday Harbor Airport (9.9 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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