Clear Lake Weather Forecast

    • 43
    • 62

    Partly Sunny

    • 45
    • 64

    Partly Sunny

    • 51
    • 65

    Rain

    • 48
    • 61

    Rain

    • 47
    • 63

    Chance Rain

    • 46
    • 61

    Chance Rain

Today 26 Sep Lowlands of Western Skagit and Northwestern Snohomish Counties

Partly sunny. Highs in the upper 50s to mid 60s. South wind to 10 Mph becoming west in the afternoon.

Tonight 26 Sep Lowlands of Western Skagit and Northwestern Snohomish Counties

Partly cloudy in the evening then becoming mostly cloudy. Lows in the 40s. North wind to 10 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Clear Lake Temperature Statistics

September Temperature

Burlington/Mount Vernon, Skagit Regional Airport (8.1 miles)

  • Lowest 16 September, 2026

    46.4 °F

  • Average September

    58.9 °F

  • Highest 9 September, 2026

    75.2 °F

Climate (2021–2026)

Burlington/Mount Vernon, Skagit Regional Airport (8.1 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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