Brewster Weather Forecast

    • 59
    • 86

    Mostly Sunny

    • 58
    • 87

    Mostly Sunny

    • 58
    • 87

    Partly Sunny

    • 49
    • 75

    Mostly Sunny

    • 53
    • 76

    Mostly Sunny

    • 58
    • 81

    Partly Sunny

Today 18 Sep Okanogan Valley

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

Tonight 18 Sep Okanogan Valley

Mostly clear. Lows in the mid to upper 50s. Gusts up to 20 Mph overnight.

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Brewster Temperature Statistics

September Temperature

Omak Airport (27.3 miles)

  • Lowest 16 September, 2025

    51.1 °F

  • Average September

    74 °F

  • Highest 3 September, 2025

    104 °F

Climate (2020–Present)

Omak Airport (27.3 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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