San Juan Co Park Weather Forecast

    • 53
    • 76

    Rain Likely

    • 52
    • 74

    Chance Rain

    • 53
    • 75

    Mostly Cloudy

    • 53
    • 75

    Partly Sunny

    • 51
    • 75

    Mostly Sunny

    • 53
    • 77

    Mostly Sunny

    • 54
    • 79

    Sunny

Today 16 Aug San Juan County

Mostly cloudy with a chance of rain until late Afternoon, then mostly cloudy with rain likely late in the afternoon. Rainfall Amounts less than a tenth of an inch likely. Highs in the upper 60s to mid 70s. South wind to 10 Mph.

Tonight 16 Aug San Juan County

Mostly cloudy with a chance of Showers. Lows in the 50s. Southwest wind to 10 Mph in the evening becoming light.

Graph Plots Open in Graphs

  • Temperature Forecast NOAA

  • Temperature Real-Time

San Juan Co Park Temperature Statistics

August Temperature

Friday Harbor Airport (6.2 miles)

  • Lowest 8 August, 2025

    47.6 °F

  • Average August

    63.4 °F

  • Highest 12 August, 2025

    90.6 °F

Climate (2020–Present)

Friday Harbor Airport (6.2 miles)

Take a look at our website widgetsAvailable free! Find Out More

  • Average Low 2020–2025

    44.3 °F

  • Average 2020–2025

    51.7 °F

  • Average High 2020–2025

    59.5 °F
Get WillyWeather+ to remove ads