Grant Lake Weather Forecast

    • 52
    • 72

    Increasing Clouds

    • 47
    • 72

    Mostly Cloudy

    • 51
    • 73

    Mostly Sunny

    • 56
    • 80

    Mostly Cloudy

    • 51
    • 77

    Slight Chance Thunderstorms

    • 50
    • 74

    Partly Sunny

Today 9 May Okanogan Valley

Sunny in the Morning, becoming partly cloudy. Highs in the lower 70s to lower 80s.

Tonight 9 May Okanogan Valley

Mostly cloudy. Lows in the lower to mid 50s. South wind 5 to 15 Mph with Gusts up to 25 Mph in the Evening, becoming light and variable.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Grant Lake Temperature Statistics

May Temperature

Omak Airport (25.5 miles)

  • Lowest 1 May, 2026

    39.7 °F

  • Average May

    66.5 °F

  • Highest 3 May, 2026

    86.6 °F

Climate (2021–Present)

Omak Airport (25.5 miles)

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  • Average Low 2021–2026

    40.9 °F

  • Average 2021–2026

    52 °F

  • Average High 2021–2026

    63 °F
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