Alta Lake State Park Weather Forecast

    • 70
    • 95

    Mostly Cloudy

    • 70
    • 93

    Partly Sunny

    • 73
    • 98

    Hot

    • 73
    • 103

    Hot

    • 72
    • 99

    Hot

    • 70
    • 94

    Partly Sunny

Today 31 Aug Okanogan Valley

Partly cloudy with a chance of Sprinkles. Highs in the 90s. East wind 5 to 15 Mph in the afternoon.

Tonight 31 Aug Okanogan Valley

Mostly cloudy with a chance of Showers and Thunderstorms with little or no rain. Lows in the mid to upper 60s. Gusts up to 20 Mph in the evening. Chance of precipitation 20 percent.

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Alta Lake State Park Temperature Statistics

August Temperature

Omak Airport (35.4 miles)

  • Lowest 8 August, 2025

    49.6 °F

  • Average August

    75.2 °F

  • Highest 12 August, 2025

    99.6 °F

Climate (2020–Present)

Omak Airport (35.4 miles)

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  • Average Low 2020–2025

    40.6 °F

  • Average 2020–2025

    51.7 °F

  • Average High 2020–2025

    62.6 °F
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