Grant Lake Weather Forecast

    • 34
    • 47

    Rain

    • 28
    • 47

    Decreasing Clouds

    • 29
    • 45

    Mostly Sunny

    • 34
    • 51

    Partly Sunny

    • 37
    • 56

    Mostly Cloudy

    • 36
    • 57

    Mostly Cloudy

    • 37
    • 54

    Partly Sunny

Today 24 Mar Okanogan Valley

Rain. Highs in the mid 40s to mid 50s. South wind 5 to 15 Mph with Gusts up to 30 Mph. Chance of precipitation near 100 percent. Rainfall Amounts less than a quarter of an inch.

Tonight 24 Mar Okanogan Valley

Mostly cloudy with a chance of rain in the Evening, then mostly clear overnight. Lows in the 30s. South wind 5 to 15 Mph with Gusts up to 35 Mph. Chance of precipitation 20 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Grant Lake Temperature Statistics

March Temperature

Omak Airport (25.5 miles)

  • Lowest 10 March, 2026

    21.7 °F

  • Average March

    46 °F

  • Highest 18 March, 2026

    74.6 °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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