Decatur Island - Davis Bay Weather Forecast

    • 50
    • 62

    Partly Sunny

    • 51
    • 63

    Partly Sunny

    • 51
    • 62

    Partly Sunny

    • 53
    • 65

    Mostly Sunny

    • 54
    • 67

    Mostly Sunny

    • 55
    • 69

    Mostly Sunny

    • 56
    • 70

    Mostly Sunny

Today 3 Jul San Juan County

Mostly sunny. Highs in the mid 60s to lower 70s. South wind to 10 Mph in the morning becoming light.

Tonight 3 Jul San Juan County

Partly cloudy in the evening then becoming mostly cloudy. Lows in the upper 40s to mid 50s. Light wind.

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Decatur Island - Davis Bay Temperature Statistics

July Temperature

Friday Harbor Airport (9.9 miles)

  • Lowest 1 July, 2025

    50 °F

  • Average July

    58 °F

  • Highest 1 July, 2025

    70 °F

Climate (2020–Present)

Friday Harbor Airport (9.9 miles)

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  • Average Low 2020–2025

    44.3 °F

  • Average 2020–2025

    51.7 °F

  • Average High 2020–2025

    59.5 °F
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