Cornwell Lake Weather Forecast

    • 24
    • 31

    Chance Snow

    • 25
    • 37

    Partly Sunny

    • 26
    • 36

    Chance Snow

    • 30
    • 33

    Snow

    • 25
    • 34

    Snow

    • 21
    • 28

    Snow

Today 20 Oct Western Okanogan County

Partly sunny with a 20 percent chance of mountain snow. Highs in the lower to mid 50s.

Tonight 20 Oct Western Okanogan County

Mostly cloudy with a 50 percent chance of mountain snow. Lows in the upper 20s to mid 30s.

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Cornwell Lake Temperature Statistics

October Temperature

Omak Airport (44.7 miles)

  • Lowest 16 October, 2025

    28 °F

  • Average October

    52.8 °F

  • Highest 7 October, 2025

    73 °F

Climate (2020–Present)

Omak Airport (44.7 miles)

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  • Average Low 2020–2025

    40.6 °F

  • Average 2020–2025

    51.7 °F

  • Average High 2020–2025

    62.7 °F
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