Winthrop Weather Forecast

    • 55
    • 84

    Mostly Cloudy

    • 56
    • 86

    Mostly Cloudy

    • 56
    • 88

    Partly Sunny

    • 53
    • 87

    Partly Sunny

    • 54
    • 88

    Partly Sunny

    • 57
    • 89

    Partly Sunny

    • 56
    • 89

    Partly Sunny

Today 15 Aug Western Okanogan County

Rain Showers likely and a chance of Thunderstorms. Haze and patchy smoke. Highs in the upper 70s to mid 80s. Chance of precipitation 60 percent. Rainfall Amounts less than a tenth of an Inch, except higher Amounts possible in Thunderstorms.

Tonight 15 Aug Western Okanogan County

Mostly cloudy with a chance of Thunderstorms. A chance of rain Showers. Haze and patchy smoke. Lows in the mid 50s to lower 60s. Chance of precipitation 50 percent. Rainfall Amounts less than a tenth of an Inch, except higher Amounts possible in Thunderstorms.

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Winthrop Temperature Statistics

August Temperature

Omak Airport (30.4 miles)

  • Lowest 3 August, 2026

    50.6 °F

  • Average August

    73.1 °F

  • Highest 6 August, 2026

    95.6 °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

    62.8 °F
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