Winthrop Weather Forecast

    • 58
    • 90

    Increasing Clouds

    • 59
    • 90

    Partly Sunny

    • 61
    • 93

    Mostly Sunny

    • 60
    • 92

    Mostly Cloudy

    • 52
    • 84

    Chance Rain Showers

    • 51
    • 83

    Mostly Sunny

    • 54
    • 86

    Partly Sunny

Today 18 Aug Western Okanogan County

Sunny. Patchy smoke. Highs in the mid 80s to lower 90s.

Tonight 18 Aug Western Okanogan County

Partly cloudy. Lows in the upper 50s to mid 60s. Gusts up to 20 Mph in the evening.

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Winthrop Temperature Statistics

August Temperature

Omak Airport (30.4 miles)

  • Lowest 3 August, 2026

    50.6 °F

  • Average August

    72.9 °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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