Delta, UT Weather Forecast
Millard County, Utah
Seven-day outlook
34–61°F across the weekThe week runs between 34° and 61°, with tomorrow the warmest day of it. The second half leans cooling, and Monday is the coolest day in it. Sunday is the wettest day, peaking near 84%. 5 of the 7 days stay 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 Delta forecast
Delta sits at 39.3633°N, 112.5438°W in Millard County, Utah. 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
- Millard County
- Coordinates
- 39.3633°N, 112.5438°W
- Population
- 3,728 · 2023 estimate
- Land area
- 8.603 sq mi
Place data from the US Census Bureau. Coordinates are the Census internal point for Delta, 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 Delta?
The nearest Doppler radar is KICX (Cedar City, UT), 124 miles to the S. 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 Delta its center is about 13,300 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 Delta can look unsupported on the mosaic and still be right. Trust the warning over the picture.
The closest instrument actually measuring the air is KDTA · Delta Muni on the ASOS/AWOS network, 2.7 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 Utah observing network as of this build.
Forecasts near Delta
- Fillmore, UT30 mi
- Gunnison, UT42 mi
- Nephi, UT45 mi
- Salina, UT47 mi
- Richfield, UT48 mi
- Manti, UT49 mi
- Ephraim, UT51 mi
- Monroe, UT56 mi
Elsewhere in Utah
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