Mary Ann Lake Weather Forecast

    • 43
    • 73

    Mostly Sunny

    • 47
    • 73

    Mostly Sunny

    • 49
    • 74

    Mostly Sunny

    • 49
    • 74

    Mostly Sunny

    • 48
    • 73

    Partly Sunny

    • 45
    • 66

    Partly Sunny

Today 17 Sep Okanogan Highlands

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

Tonight 17 Sep Okanogan Highlands

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

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Mary Ann Lake Temperature Statistics

September Temperature

Omak Airport (37.9 miles)

  • Lowest 14 September, 2026

    44.1 °F

  • Average September

    63.6 °F

  • Highest 10 September, 2026

    85.6 °F

Climate (2021–2026)

Omak Airport (37.9 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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