Winthrop Weather Forecast

    • 46
    • 71

    Rain Showers

    • 37
    • 65

    Rain Showers

    • 34
    • 63

    Partly Sunny

    • 35
    • 65

    Partly Sunny

    • 38
    • 66

    Partly Sunny

    • 39
    • 65

    Partly Sunny

Today 24 Sep Western Okanogan County

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

Tonight 24 Sep Western Okanogan County

Cloudy. Rain Showers overnight. Lows in the mid 40s to lower 50s. Chance of precipitation 90 percent. Rainfall Amounts less than a quarter of an inch.

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Winthrop Temperature Statistics

September Temperature

Omak Airport (30.4 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 (30.4 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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