Decatur Island - Davis Bay Weather Forecast

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    • 54

    Rain

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    • 52

    Rain

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    • 51

    Rain Likely

    • 48
    • 54

    Mostly Cloudy

    • 45
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    Mostly Cloudy

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    • 53

    Partly Sunny

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    Partly Sunny

Today 31 Jan San Juan County

Cloudy. Rain at Times in the morning. A chance of rain in the afternoon. Rainfall Amounts a tenth to a quarter of an inch possible. Highs in the lower to mid 50s. East wind 10 to 15 Mph becoming southeast in the afternoon.

Tonight 31 Jan San Juan County

Mostly cloudy in the Evening, then a slight chance of rain in the evening. Cloudy with a chance of rain after midnight. Lows in the 40s. Light wind becoming southeast to 10 Mph with Gusts to 25 Mph after midnight.

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Decatur Island - Davis Bay Temperature Statistics

January Temperature

Friday Harbor Airport (9.9 miles)

  • Lowest 25 January, 2026

    27 °F

  • Average January

    43 °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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