Larch Lake Weather Forecast

    • 51
    • 73

    Mostly Sunny

    • 50
    • 65

    Mostly Sunny

    • 53
    • 69

    Mostly Sunny

    • 60
    • 78

    Partly Sunny

    • 59
    • 81

    Partly Sunny

    • 54
    • 76

    Partly Sunny

    • 51
    • 68

    Partly Sunny

Today 19 Jun Foothills and Valleys of the North Cascades

Sunny. Highs in the upper 70s to mid 80s. West wind around 10 Mph.

Tonight 19 Jun Foothills and Valleys of the North Cascades

Mostly clear. Lows in the lower to mid 50s. Northwest wind to 10 Mph becoming south after midnight.

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Larch Lake Temperature Statistics

June Temperature

Arlington Municipal Airport (16.2 miles)

  • Lowest 1 June, 2026

    39.9 °F

  • Average June

    59.8 °F

  • Highest 15 June, 2026

    86 °F

Climate (2021–2026)

Arlington Municipal Airport (16.2 miles)

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  • Average Low 2021–2026

    42.6 °F

  • Average 2021–2026

    50.9 °F

  • Average High 2021–2026

    60 °F
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