Fort Okanogan State Park Weather Forecast

    • 68
    • 84

    Rain Showers Likely

    • 58
    • 86

    Chance Rain Showers

    • 60
    • 86

    Partly Sunny

    • 62
    • 86

    Partly Sunny

    • 60
    • 88

    Mostly Sunny

    • 59
    • 90

    Mostly Sunny

Today 15 Aug Okanogan Valley

Areas of smoke in the morning. Mostly cloudy with a 20 percent chance of rain Showers. Highs in the mid 70s to lower 80s. South wind 5 to 15 Mph with Gusts up to 30 Mph in the afternoon.

Tonight 15 Aug Okanogan Valley

Cloudy. A chance of rain Showers in the Evening, then rain Showers likely overnight. Lows in the lower to mid 60s. South wind 5 to 15 Mph with Gusts up to 25 Mph. Chance of precipitation 70 percent. Rainfall Amounts less than a quarter of an inch.

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Fort Okanogan State Park Temperature Statistics

August Temperature

Omak Airport (25.5 miles)

  • Lowest 8 August, 2025

    49.6 °F

  • Average August

    75.5 °F

  • Highest 10 August, 2025

    98.7 °F

Climate (2020–Present)

Omak Airport (25.5 miles)

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  • Average Low 2020–2025

    40.6 °F

  • Average 2020–2025

    51.7 °F

  • Average High 2020–2025

    62.7 °F
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