Fort Okanogan State Park Weather Forecast

    • 49
    • 64

    Rain Showers

    • 53
    • 73

    Increasing Clouds

    • 50
    • 69

    Chance Rain Showers

    • 53
    • 78

    Mostly Sunny

    • 55
    • 82

    Mostly Sunny

    • 54
    • 82

    Mostly Sunny

    • 54
    • 81

    Partly Sunny

Today 13 Sep Okanogan Valley

Rain Showers and a chance of Thunderstorms. Some Thunderstorms may produce heavy rainfall. Highs in the mid 50s to mid 60s. Chance of precipitation near 100 percent. Rainfall Amounts up to a half inch Possible, except higher Amounts possible in Thunderstorms.

Tonight 13 Sep Okanogan Valley

Cloudy in the Evening, becoming partly cloudy. A chance of rain Showers in the evening. Lows in the mid to upper 40s. Chance of precipitation 50 percent. Rainfall Amounts less than a tenth of an inch.

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  • Temperature Real-Time

Fort Okanogan State Park Temperature Statistics

September Temperature

Omak Airport (25.5 miles)

  • Lowest 6 September, 2026

    46.7 °F

  • Average September

    64.6 °F

  • Highest 10 September, 2026

    85.6 °F

Climate (2021–2026)

Omak Airport (25.5 miles)

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  • Average Low 2021–2026

    40.7 °F

  • Average 2021–2026

    51.8 °F

  • Average High 2021–2026

    62.9 °F
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