Decatur Island - Davis Bay Weather Forecast

    • 41
    • 48

    Mostly Sunny

    • 40
    • 46

    Mostly Sunny

    • 39
    • 47

    Partly Sunny

    • 39
    • 46

    Mostly Cloudy

    • 38
    • 45

    Mostly Cloudy

    • 38
    • 44

    Mostly Cloudy

Today 17 Jan San Juan County

Sunny. Highs in the mid 40s to lower 50s. Light wind.

Tonight 17 Jan San Juan County

Mostly clear. Lows in the mid 30s to lower 40s. Light wind.

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Decatur Island - Davis Bay Temperature Statistics

January Temperature

Friday Harbor Airport (9.9 miles)

  • Lowest 8 January, 2026

    33.1 °F

  • Average January

    45.1 °F

  • Highest 13 January, 2026

    53.1 °F

Climate (2021–Present)

Friday Harbor Airport (9.9 miles)

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  • Average Low 2021–2026

    44.4 °F

  • Average 2021–2026

    51.8 °F

  • Average High 2021–2026

    59.6 °F
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