Winthrop Weather Forecast

    • 67
    • 96

    Cloudy

    • 54
    • 92

    Mostly Cloudy

    • 51
    • 82

    Mostly Sunny

    • 56
    • 88

    Mostly Sunny

    • 56
    • 92

    Partly Sunny

    • 49
    • 86

    Partly Sunny

    • 48
    • 83

    Partly Sunny

Today 21 Aug Western Okanogan County

Mostly cloudy. Haze and patchy smoke. Highs in the lower to mid 90s.

Tonight 21 Aug Western Okanogan County

Cloudy. Haze and patchy smoke. A chance of rain Showers overnight. Lows in the upper 60s to lower 70s. Chance of precipitation 20 percent.

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Winthrop Temperature Statistics

August Temperature

Omak Airport (30.4 miles)

  • Lowest 3 August, 2026

    50.6 °F

  • Average August

    73.8 °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

    62.9 °F
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