Winthrop Weather Forecast

    • 44
    • 82

    Increasing Clouds

    • 39
    • 78

    Partly Sunny

    • 42
    • 72

    Partly Sunny

    • 42
    • 67

    Rain Showers Likely

    • 37
    • 64

    Chance Rain Showers

    • 37
    • 63

    Partly Sunny

Today 21 Sep Western Okanogan County

Sunny in the Morning, becoming partly cloudy. Highs in the mid 70s to lower 80s.

Tonight 21 Sep Western Okanogan County

Mostly cloudy. Lows in the mid 40s to lower 50s.

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  • Temperature Real-Time

Winthrop Temperature Statistics

September Temperature

Omak Airport (30.4 miles)

  • Lowest 14 September, 2026

    44.7 °F

  • Average September

    63.9 °F

  • Highest 10 September, 2026

    85.6 °F

Climate (2021–2026)

Omak Airport (30.4 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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