Union Gap, WA Weather Forecast
Yakima County, Washington
Seven-day outlook
31–53°F across the weekThe week runs between 31° and 53°, with Wednesday the warmest day of it. There is no real trend across it: one day looks much like the next. Every day in the outlook stays dry.
Forecasts come from the National Weather Service's own computer models, and current conditions from the nearest reporting weather station. Both are served through the weather API. A forecast is guidance, not a warning, and anything the Weather Service has actually issued is on the live map.
The written summaries on this page are generated from the forecast data above, not by a meteorologist. Each sentence is a reading of the same numbers you can see, and no forecaster has reviewed them.
About the Union Gap forecast
Union Gap sits at 46.5544°N, 120.4921°W in Yakima County, Washington. The forecast above is drawn for that point from the National Weather Service's own computer models: a seven-day outlook, and a finer-grained one covering the next eighteen hours where it reaches, and the radar and alert panels show what the Weather Service has out over the area right now.
- County
- Yakima County
- Coordinates
- 46.5544°N, 120.4921°W
- Population
- 6,439 · 2023 estimate
- Land area
- 5.577 sq mi
Place data from the US Census Bureau. Coordinates are the Census internal point for Union Gap, and the forecast is for that location, not for every address inside the city limits, and a large city can have real weather differences from one side to the other.
How well can the network see Union Gap?
The nearest Doppler radar is KPDT (Pendleton, OR), 99 miles to the SE. A WSR-88D's lowest routine scan sits half a degree above horizontal, and the earth curves away beneath it, so by the time that beam reaches Union Gap its center is about 9,400 ft above ground. At that range the beam overshoots the layer where severe weather organizes. The radar is describing the middle of the storm, not its base , which is why a warning for Union Gap can look unsupported on the mosaic and still be right. Trust the warning over the picture.
The closest instrument actually measuring the air is KYKM · Yakima/McAllister Fld on the ASOS/AWOS network, 2.1 miles away. Close enough that its readings are, for practical purposes, the conditions in town.
Beam height is the standard 4/3-earth approximation for the 0.5° scan and assumes normal refraction; it is where the center of the beam is, not its edges, and unusual temperature profiles bend it. Radar siting from the NWS WSR-88D network, station positions from the Washington observing network as of this build.
Forecasts near Union Gap
- Yakima, WA4 mi
- Moxee, WA5 mi
- Selah, WA7 mi
- Wapato, WA8 mi
- Zillah, WA15 mi
- Toppenish, WA15 mi
- Granger, WA20 mi
- Sunnyside, WA28 mi
Elsewhere in Washington
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