Decatur Island - Davis Bay Weather Forecast

    • 35
    • 44

    Partly Sunny

    • 37
    • 43

    Mostly Cloudy

    • 41
    • 45

    Mostly Cloudy

    • 42
    • 49

    Chance Rain

    • 44
    • 49

    Chance Rain

    • 46
    • 50

    Chance Rain

    • 45
    • 52

    Chance Rain

Today 24 Jan San Juan County

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

Tonight 24 Jan San Juan County

Partly cloudy. Lows in the mid 20s to lower 30s. Light wind.

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Decatur Island - Davis Bay Temperature Statistics

January Temperature

Friday Harbor Airport (9.9 miles)

  • Lowest 22 January, 2026

    30.9 °F

  • Average January

    43.6 °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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