Cougar Lake Weather Forecast

    • 45
    • 66

    Becoming Sunny

    • 47
    • 67

    Mostly Sunny

    • 43
    • 65

    Partly Sunny

    • 38
    • 59

    Partly Sunny

    • 37
    • 53

    Mostly Cloudy

    • 37
    • 51

    Chance Rain Showers

    • 34
    • 48

    Slight Chance Rain/Snow

Today 19 Sep Western Okanogan County

Partly cloudy with a 20 percent chance of high mountain snow Showers. Highs in the lower to mid 60s.

Tonight 19 Sep Western Okanogan County

Partly cloudy. Lows in the upper 40s to mid 50s.

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Cougar Lake Temperature Statistics

September Temperature

Omak Airport (51.6 miles)

  • Lowest 14 September, 2026

    44.7 °F

  • Average September

    63.8 °F

  • Highest 10 September, 2026

    85.6 °F

Climate (2021–2026)

Omak Airport (51.6 miles)

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  • Average Low 2021–2026

    40.7 °F

  • Average 2021–2026

    51.8 °F

  • Average High 2021–2026

    62.9 °F
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