Clear Lake Weather Forecast

    • 48
    • 69

    Decreasing Clouds

    • 50
    • 72

    Mostly Sunny

    • 53
    • 72

    Rain

    • 48
    • 66

    Chance Rain

    • 50
    • 68

    Slight Chance Rain

    • 51
    • 71

    Chance Rain

Today 18 Sep Lowlands of Western Skagit and Northwestern Snohomish Counties

Partly sunny until late afternoon then becoming sunny. Highs in the mid 60s to lower 70s. Light wind becoming northwest 10 to 15 Mph in the afternoon.

Tonight 18 Sep Lowlands of Western Skagit and Northwestern Snohomish Counties

Mostly clear. Lows near 50. Northwest wind to 10 Mph in the evening becoming light.

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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 1 September, 2025

    51.8 °F

  • Average September

    61.3 °F

  • Highest 16 September, 2025

    82.4 °F

Climate (2020–Present)

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

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  • Average Low 2020–2025

    43.7 °F

  • Average 2020–2025

    51.3 °F

  • Average High 2020–2025

    59.7 °F
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