Charles Island Weather Forecast

    • 37
    • 44

    Becoming Sunny

    • 35
    • 45

    Sunny

    • 35
    • 44

    Partly Sunny

    • 36
    • 43

    Mostly Cloudy

    • 39
    • 45

    Mostly Cloudy

    • 41
    • 48

    Chance Rain

    • 43
    • 49

    Chance Rain

Today 22 Jan San Juan County

Mostly cloudy. Highs in the lower to mid 40s. Light wind.

Tonight 22 Jan San Juan County

Mostly cloudy until early morning then becoming mostly clear. Lows in the 30s. Light wind.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Charles Island Temperature Statistics

January Temperature

Friday Harbor Airport (7.5 miles)

  • Lowest 8 January, 2026

    33.1 °F

  • Average January

    44.2 °F

  • Highest 13 January, 2026

    53.1 °F

Climate (2021–Present)

Friday Harbor Airport (7.5 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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