Brewster Weather Forecast

    • 55
    • 74

    Rain Showers

    • 45
    • 68

    Rain Showers

    • 45
    • 65

    Partly Sunny

    • 45
    • 67

    Partly Sunny

    • 47
    • 68

    Partly Sunny

    • 47
    • 67

    Partly Sunny

    • 47
    • 68

    Partly Sunny

Today 24 Sep Okanogan Valley

Mostly cloudy. Highs in the upper 60s to mid 70s.

Tonight 24 Sep Okanogan Valley

Cloudy. A chance of rain Showers overnight. Lows in the lower to mid 50s. Chance of precipitation 50 percent. Rainfall Amounts less than a tenth of an inch.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Brewster Temperature Statistics

September Temperature

Omak Airport (27.3 miles)

  • Lowest 14 September, 2026

    44.7 °F

  • Average September

    64.5 °F

  • Highest 21 September, 2026

    86.6 °F

Climate (2021–2026)

Omak Airport (27.3 miles)

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  • Average Low 2021–2026

    40.8 °F

  • Average 2021–2026

    51.8 °F

  • Average High 2021–2026

    62.9 °F
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