Winthrop Weather Forecast

    • 42
    • 68

    Increasing Clouds

    • 45
    • 66

    Partly Sunny

    • 44
    • 75

    Partly Sunny

    • 42
    • 75

    Mostly Sunny

    • 46
    • 78

    Partly Sunny

    • 43
    • 78

    Partly Sunny

Today 30 Sep Western Okanogan County

Sunny. Highs in the 60s.

Tonight 30 Sep Western Okanogan County

Mostly cloudy. Lows in the upper 30s to upper 40s.

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Winthrop Temperature Statistics

September Temperature

Omak Airport (30.4 miles)

  • Lowest 28 September, 2026

    35.1 °F

  • Average September

    62.9 °F

  • Highest 21 September, 2026

    86.6 °F

Climate (2021–2026)

Omak Airport (30.4 miles)

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  • Average Low 2021–2026

    40.7 °F

  • Average 2021–2026

    51.8 °F

  • Average High 2021–2026

    62.9 °F
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