San Juan Island - Friday Harbor Weather Forecast

    • 49
    • 61

    Rain Showers

    • 50
    • 63

    Chance Rain Showers

    • 51
    • 66

    Partly Sunny

    • 52
    • 69

    Mostly Sunny

    • 53
    • 75

    Partly Sunny

    • 51
    • 68

    Mostly Cloudy

Today 20 Jun San Juan County

Cloudy. A chance of Showers until late Afternoon, then a slight chance of Showers late in the afternoon. Highs in the upper 50s to mid 60s. Southwest wind 10 to 15 Mph becoming south in the afternoon.

Tonight 20 Jun San Juan County

Cloudy. A chance of Showers in the Evening, then Showers after midnight. Rainfall Amounts a tenth to a quarter of an inch possible. Lows in the mid 40s to lower 50s. Southwest wind 10 to 15 Mph.

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San Juan Island - Friday Harbor Temperature Statistics

June Temperature

Friday Harbor Airport (1.9 miles)

  • Lowest 2 June, 2025

    43.6 °F

  • Average June

    58.1 °F

  • Highest 8 June, 2025

    84.7 °F

Climate (2020–Present)

Friday Harbor Airport (1.9 miles)

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  • Average Low 2020–2025

    44.3 °F

  • Average 2020–2025

    51.6 °F

  • Average High 2020–2025

    59.5 °F
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