Union Gap Weather Forecast

    • 56
    • 88

    Increasing Clouds

    • 58
    • 82

    Rain Showers Likely

    • 53
    • 74

    Rain Showers Likely

    • 55
    • 78

    Partly Sunny

    • 55
    • 79

    Slight Chance Thunderstorms

    • 55
    • 81

    Partly Sunny

Today 7 Sep Yakima Valley

Partly cloudy with a chance of rain Showers in the Morning, then sunny with a chance of Showers and Thunderstorms in the afternoon. Haze through the day. Highs in the mid to upper 80s. West wind 5 to 10 Mph. Chance of precipitation 40 percent. Rainfall Amounts less than a tenth of an Inch, except higher Amounts possible in Thunderstorms.

Tonight 7 Sep Yakima Valley

Partly cloudy. A 20 percent chance of Showers and Thunderstorms in the evening. Lows in the mid to upper 50s. Northwest wind 5 to 10 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Union Gap Temperature Statistics

September Temperature

Yakima Air Terminal - McAllister Field (2.5 miles)

  • Lowest 2 September, 2025

    57.9 °F

  • Average September

    76.7 °F

  • Highest 3 September, 2025

    99 °F

Climate (2020–Present)

Yakima Air Terminal - McAllister Field (2.5 miles)

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  • Average Low 2020–2025

    39.5 °F

  • Average 2020–2025

    52.8 °F

  • Average High 2020–2025

    65.2 °F
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