Bonaparte Lake Weather Forecast

    • 54
    • 73

    Mostly Sunny

    • 55
    • 77

    Mostly Sunny

    • 56
    • 77

    Partly Sunny

    • 57
    • 77

    Mostly Sunny

    • 51
    • 73

    Partly Sunny

    • 46
    • 65

    Partly Sunny

Today 16 Sep Okanogan Highlands

Sunny. Highs in the upper 70s to mid 80s.

Tonight 16 Sep Okanogan Highlands

Mostly clear. Lows in the mid 40s to mid 50s.

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Bonaparte Lake Temperature Statistics

September Temperature

Omak Airport (31.1 miles)

  • Lowest 12 September, 2025

    55 °F

  • Average September

    76.1 °F

  • Highest 3 September, 2025

    104 °F

Climate (2020–Present)

Omak Airport (31.1 miles)

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  • Average Low 2020–2025

    40.7 °F

  • Average 2020–2025

    51.7 °F

  • Average High 2020–2025

    62.7 °F
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