Great Western Lake Weather Forecast

    • 41
    • 64

    Slight Chance Rain Showers

    • 39
    • 62

    Increasing Clouds

    • 38
    • 58

    Partly Sunny

    • 37
    • 55

    Slight Chance Thunderstorms

    • 40
    • 62

    Partly Sunny

    • 43
    • 65

    Partly Sunny

    • 44
    • 67

    Partly Sunny

Today 13 May Okanogan Valley

Rain Showers and a chance of Thunderstorms. Highs in the lower 60s to lower 70s. Temperature falling into the mid 50s in the afternoon. Breezy. West wind 10 to 20 Mph with Gusts up to 40 Mph. Chance of precipitation near 100 percent. Rainfall Amounts up to a half inch Possible, except higher Amounts possible in Thunderstorms.

Tonight 13 May Okanogan Valley

Mostly clear. Lows in the lower to mid 40s. Windy. Southwest wind 15 to 25 Mph in the Evening, becoming light and variable. Gusts up to 35 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Great Western Lake Temperature Statistics

May Temperature

Omak Airport (27.3 miles)

  • Lowest 1 May, 2026

    39.7 °F

  • Average May

    65.1 °F

  • Highest 3 May, 2026

    86.6 °F

Climate (2021–Present)

Omak Airport (27.3 miles)

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  • Average Low 2021–2026

    41 °F

  • Average 2021–2026

    52 °F

  • Average High 2021–2026

    63.1 °F
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