Sidley Lake Weather Forecast

    • 50
    • 79

    Mostly Sunny

    • 51
    • 78

    Partly Sunny

    • 50
    • 78

    Mostly Sunny

    • 47
    • 72

    Partly Sunny

    • 43
    • 68

    Partly Sunny

    • 45
    • 65

    Partly Sunny

Today 17 Sep Okanogan Highlands

Sunny. Highs in the 80s.

Tonight 17 Sep Okanogan Highlands

Mostly clear. Lows in the lower 50s to lower 60s.

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Sidley Lake Temperature Statistics

September Temperature

Omak Airport (38.5 miles)

  • Lowest 12 September, 2025

    55 °F

  • Average September

    75.2 °F

  • Highest 3 September, 2025

    104 °F

Climate (2020–Present)

Omak Airport (38.5 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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