Grantsville, UT Weather Forecast
Tooele County, Utah
Seven-day outlook
39–60°F across the weekThe week runs between 39° and 60°, 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 96%. 4 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 Grantsville forecast
Grantsville sits at 40.6113°N, 112.4691°W in Tooele 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
- Tooele County
- Coordinates
- 40.6113°N, 112.4691°W
- Population
- 15,267 · 2023 estimate
- Land area
- 39.881 sq mi
Place data from the US Census Bureau. Coordinates are the Census internal point for Grantsville, 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 Grantsville?
The nearest Doppler radar is KMTX (Salt Lake City, UT), 45 miles to the N. 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 Grantsville its center is about 3,100 ft above ground. That is comfortably inside the useful range. The lowest scan passes low enough over Grantsville to show rotation in the part of a storm where tornadoes actually form.
The closest instrument actually measuring the air is KTVY · Tooele Valley Arpt on the ASOS/AWOS network, 6.1 miles away. Near enough to be representative on most days, though a summer thunderstorm can soak one and miss the other entirely.
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 Grantsville
- Erda, UT8 mi
- Tooele, UT10 mi
- Lake Point, UT12 mi
- Magna metro, UT18 mi
- Kearns metro, UT24 mi
- West Jordan, UT25 mi
- West Valley City, UT25 mi
- Herriman, UT25 mi
Elsewhere in Utah
Salt Lake CityWest Valley CityWest JordanProvoSt. GeorgeOremAll Utah forecasts →