Winthrop Weather Forecast

    • 30
    • 46

    Rain Likely

    • 29
    • 41

    Rain

    • 25
    • 40

    Snow

    • 21
    • 34

    Rain/Snow

    • 18
    • 35

    Chance Snow

    • 17
    • 33

    Snow Likely

    • 20
    • 31

    Chance Snow

Today 15 Dec Western Okanogan County

Rain and high mountain snow likely. Little or no high mountain snow accumulation. Highs in the mid 40s to lower 50s. Windy. South wind 5 to 15 Mph with Gusts up to 30 Mph, except southwest 20 to 30 Mph with Gusts up to 60 Mph in the Mountains. Chance of precipitation 70 percent.

Tonight 15 Dec Western Okanogan County

Rain and mountain snow in the Evening, then a chance of mountain snow overnight. Patchy blowing mountain snow. Mountain snow may be heavy at Times in the evening. Mountain snow accumulation of 3 to 6 Inches. Snow level 4500 feet in the evening. Lows in the upper 20s to mid 30s. Windy. West wind 10 to 20 Mph decreasing to 5 to 15 Mph overnight. In the Mountains, west wind 20 to 30 Mph. Gusts up to 35 Mph, except 60 Mph in the Mountains. Chance of precipitation near 100 percent.

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Winthrop Temperature Statistics

December Temperature

Omak Airport (30.4 miles)

  • Lowest 1 December, 2025

    28.9 °F

  • Average December

    37.6 °F

  • Highest 9 December, 2025

    51.1 °F

Climate (2020–Present)

Omak Airport (30.4 miles)

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  • Average Low 2020–2025

    40.8 °F

  • Average 2020–2025

    51.9 °F

  • Average High 2020–2025

    62.9 °F
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