Mountain Lake Weather Forecast

    • 32
    • 38

    Partly Sunny

    • 31
    • 38

    Mostly Sunny

    • 31
    • 38

    Partly Sunny

    • 33
    • 38

    Chance Rain/Snow

    • 36
    • 38

    Slight Chance Rain/Snow

    • 37
    • 42

    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

Mountain Lake Temperature Statistics

January Temperature

Eastsound, Orcas Island Airport (5 miles)

  • Lowest 19 January, 2026

    37.4 °F

  • Average January

    44.5 °F

  • Highest 13 January, 2026

    55.4 °F

Climate (2021–Present)

Eastsound, Orcas Island Airport (5 miles)

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  • Average Low 2021–2026

    46.2 °F

  • Average 2021–2026

    51.9 °F

  • Average High 2021–2026

    57.8 °F
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