Union Gap Weather Forecast

    • 41
    • 58

    Chance Rain

    • 37
    • 57

    Mostly Cloudy

    • 36
    • 55

    Partly Sunny

    • 40
    • 55

    Mostly Cloudy

    • 38
    • 58

    Rain Likely

    • 35
    • 52

    Rain Likely

Today 11 Dec Yakima Valley

Mostly cloudy with a 20 percent chance of rain. Highs in the mid 50s to mid 60s. West wind 5 to 15 Mph. Gusts up to 40 Mph decreasing to 20 Mph in the afternoon.

Tonight 11 Dec Yakima Valley

Mostly cloudy. A 20 percent chance of rain in the evening. Lows in the lower to mid 40s. West wind 5 to 10 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Union Gap Temperature Statistics

December Temperature

Yakima Air Terminal - McAllister Field (2.5 miles)

  • Lowest 2 December, 2025

    23 °F

  • Average December

    39.5 °F

  • Highest 8 December, 2025

    60.1 °F

Climate (2020–Present)

Yakima Air Terminal - McAllister Field (2.5 miles)

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  • Average Low 2020–2025

    39.7 °F

  • Average 2020–2025

    52.9 °F

  • Average High 2020–2025

    65.2 °F
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