Decatur Island - Davis Bay Weather Forecast

    • 41
    • 50

    Rain

    • 41
    • 45

    Rain

    • 43
    • 46

    Rain

    • 41
    • 47

    Rain

    • 41
    • 47

    Rain

    • 38
    • 45

    Chance Rain

    • 36
    • 44

    Chance Rain

Today 18 Dec San Juan County

Windy. Rain likely late in the Morning, then rain at Times early in the afternoon. A chance of rain late in the afternoon. Rainfall Amounts a tenth to a quarter of an inch possible. Highs near 50. Southeast wind 20 to 35 Mph with Gusts to 50 Mph.

Tonight 18 Dec San Juan County

Windy. Mostly cloudy in the evening then becoming partly cloudy. Rain likely in the Evening, then a slight chance of rain late in the evening. A slight chance of rain and snow late in the night. No snow accumulation. Lows near 40. West wind 15 to 30 Mph. Gusts to 45 Mph decreasing to 35 Mph after midnight.

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Decatur Island - Davis Bay Temperature Statistics

December Temperature

Friday Harbor Airport (9.9 miles)

  • Lowest 1 December, 2025

    36 °F

  • Average December

    47.4 °F

  • Highest 15 December, 2025

    57 °F

Climate (2020–Present)

Friday Harbor Airport (9.9 miles)

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  • Average Low 2020–2025

    44.4 °F

  • Average 2020–2025

    51.8 °F

  • Average High 2020–2025

    59.6 °F
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