San Juan Island - Friday Harbor Weather Forecast

    • 52
    • 64

    Mostly Cloudy

    • 52
    • 62

    Chance Rain

    • 50
    • 65

    Partly Sunny

    • 51
    • 68

    Mostly Sunny

    • 51
    • 69

    Mostly Sunny

    • 51
    • 65

    Partly Sunny

Today 24 Sep San Juan County

Cloudy in the morning then becoming partly cloudy. Highs in the lower to mid 60s. Light wind.

Tonight 24 Sep San Juan County

Mostly cloudy. A slight chance of rain after midnight. Lows in the lower to mid 50s. South wind 10 to 15 Mph becoming southeast after midnight.

Graph Plots Open in Graphs
  • Temperature Forecast NOAA

  • Temperature Real-Time

San Juan Island - Friday Harbor Temperature Statistics

September Temperature

Friday Harbor, Friday Harbor Airport (1.2 miles)

  • Lowest 15 September, 2017

    44.1 °F
  • Average September

    57.6 °F
  • Highest 3 September, 2017

    86 °F

Climate (2010–Present)

Friday Harbor, Friday Harbor Airport (1.2 miles)

Take a look at our website widgetsAvailable free! Find Out More
  • Average Low 2010–Present

    44 °F
  • Average 2010–Present

    51.2 °F
  • Average High 2010–Present

    59.2 °F
Get an account to remove ads