Grandy Lake Weather Forecast

    • 49
    • 61

    Increasing Clouds

    • 52
    • 62

    Chance Rain

    • 50
    • 66

    Partly Sunny

    • 51
    • 72

    Mostly Sunny

    • 53
    • 74

    Partly Sunny

    • 51
    • 67

    Partly Sunny

Today 30 Sep Foothills and Valleys of the North Cascades

Mostly sunny. Patchy fog in the morning. Highs in the upper 50s to mid 60s. Light wind.

Tonight 30 Sep Foothills and Valleys of the North Cascades

Mostly cloudy. Lows in the mid to upper 40s. Light wind.

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Grandy Lake Temperature Statistics

September Temperature

Burlington/Mount Vernon, Skagit Regional Airport (28.6 miles)

  • Lowest 27 September, 2026

    41 °F

  • Average September

    58.3 °F

  • Highest 9 September, 2026

    75.2 °F

Climate (2021–2026)

Burlington/Mount Vernon, Skagit Regional Airport (28.6 miles)

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  • Average Low 2021–2026

    43.8 °F

  • Average 2021–2026

    51.2 °F

  • Average High 2021–2026

    59.2 °F
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