Heather Lake Weather Forecast

    • 46
    • 59

    Increasing Clouds

    • 45
    • 53

    Mostly Cloudy

    • 50
    • 62

    Mostly Sunny

    • 52
    • 67

    Mostly Sunny

    • 46
    • 60

    Mostly Cloudy

    • 46
    • 55

    Slight Chance Rain

    • 48
    • 58

    Partly Sunny

Today 6 Sep Cascades of Snohomish and Northern King Counties

Partly sunny in the morning then becoming mostly sunny. Freezing level near 9500 feet. Afternoon pass Temperatures in the lower 60s. Light wind.

Tonight 6 Sep Cascades of Snohomish and Northern King Counties

Partly cloudy. A slight chance of rain in the evening. Snow level near 8000 feet. Lows in the lower 40s. Light wind.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Heather Lake Temperature Statistics

September Temperature

Arlington Municipal Airport (18 miles)

  • Lowest 1 September, 2026

    51.1 °F

  • Average September

    60.6 °F

  • Highest 4 September, 2026

    73 °F

Climate (2021–2026)

Arlington Municipal Airport (18 miles)

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  • Average Low 2021–2026

    42.6 °F

  • Average 2021–2026

    50.9 °F

  • Average High 2021–2026

    59.9 °F
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