Decatur Island - Davis Bay Weather Forecast

    • 39
    • 48

    Decreasing Clouds

    • 38
    • 45

    Partly Sunny

    • 38
    • 44

    Mostly Cloudy

    • 38
    • 45

    Partly Sunny

    • 40
    • 45

    Mostly Cloudy

    • 43
    • 47

    Chance Rain

Today 20 Jan San Juan County

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

Tonight 20 Jan San Juan County

Mostly clear. Lows in the mid to upper 30s. 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

    44.8 °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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