Upper Granite Lake Weather Forecast

    • 33
    • 42

    Sunny

    • 31
    • 43

    Sunny

    • 32
    • 42

    Sunny

    • 31
    • 44

    Sunny

    • 31
    • 44

    Partly Sunny

    • 29
    • 42

    Partly Sunny

Today 15 Jan Cascades of Whatcom and Skagit Counties

Sunny. Patchy dense fog in the morning. Freezing level near 9500 feet.

Tonight 15 Jan Cascades of Whatcom and Skagit Counties

Clear. Freezing level near 9000 feet.

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  • Temperature Real-Time

Upper Granite Lake Temperature Statistics

January Temperature

Arlington Municipal Airport (43.5 miles)

  • Lowest 1 January, 2026

    26.6 °F

  • Average January

    44.6 °F

  • Highest 13 January, 2026

    57.9 °F

Climate (2021–Present)

Arlington Municipal Airport (43.5 miles)

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  • Average Low 2021–2026

    42.5 °F

  • Average 2021–2026

    50.7 °F

  • Average High 2021–2026

    59.8 °F
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