Grant Lake Weather Forecast

    • 44
    • 61

    Gradual Clearing

    • 47
    • 65

    Partly Sunny

    • 51
    • 71

    Partly Sunny

    • 56
    • 77

    Partly Sunny

    • 54
    • 78

    Partly Sunny

    • 56
    • 76

    Partly Sunny

Today 22 May Okanogan Valley

Mostly cloudy. A chance of rain Showers in the afternoon. Highs in the lower 60s to lower 70s. Chance of precipitation 20 percent.

Tonight 22 May Okanogan Valley

Partly cloudy. Lows in the 40s.

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Grant Lake Temperature Statistics

May Temperature

Omak Airport (25.5 miles)

  • Lowest 5 May, 2025

    32.6 °F

  • Average May

    55.8 °F

  • Highest 2 May, 2025

    80.7 °F

Climate (2020–Present)

Omak Airport (25.5 miles)

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  • Average Low 2020–2025

    40.6 °F

  • Average 2020–2025

    51.6 °F

  • Average High 2020–2025

    62.5 °F
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