The Brigham City plate. Relief from Copernicus GLO-30; rivers and lakes from USGS NHD; watersheds from the USGS Watershed Boundary Dataset; roads and city limits from Census TIGER 2024.
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69° on Nov. 15, 2016, the hottest reading for this week of the year since 1974. Next is 69° in 2025.
Brigham City’s center stands about 4,440 ft above sea level. Within three miles the land runs from 4,220 ft to 6,990 ft, a difference of 2,770 ft: mountain country. The highest named summit within 15 miles is Ben Lomond, about 9,660 ft, 11 miles south-southeast.
Under the town center the state geologic map shows Lake Bonneville deposits (clay), from the Pleistocene, less than 2.6 million years old.
The section below crosses 12 rock units mapped at the surface.
Heights every 0.1 mile from the Copernicus GLO-90 surface model; vertical exaggeration about 4×. The colored band under the surface is the rock the state geologic map shows at the surface, not a picture of what lies beneath.
Clay. Age: Pleistocene, less than 2.6 million years old. About 9 mi of the line.
Mixed-clastic. Age: Mesoproterozoic to Neoproterozoic, 542 to 1,600 million years old. About 3 mi of the line.
Sandstone, carbonate. Age: Middle Pennsylvanian to Permian, 273 to 315 million years old. About 3 mi of the line.
Metamorphic. Age: Neoarchean to Paleoproterozoic, 1.6 to 2.8 billion years old. About 2 mi of the line.
Dolostone. Age: Early Devonian to Late Devonian, 359 to 422 million years old. About 1 mi of the line.
Carbonate. Age: Early Mississippian to Late Mississippian, 324 to 359 million years old. About 1 mi of the line.
From the USGS State Geologic Map Compilation (Horton and others, 2017), the states’ geologic maps joined at a common scale. 6 smaller units along the line are not listed.
Heights from Copernicus GLO-90 (a surface model: it includes buildings and tree canopy); summits from USGS GNIS; rivers from USGS NHDPlus HR; rock from the USGS State Geologic Map Compilation.
A raindrop that lands in Brigham City reaches Great Salt Lake by way of Black Slough, the Reeder Overflow and the Bear River: about 17 river miles. Great Salt Lake has no outlet to the sea: the water leaves only by evaporating or soaking into the ground.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Brigham City; river miles along the main stem, rounded.
Brigham City has a dry-summer hot-summer continental climate. Summer afternoons average 91° in July; winter nights fall to about 18° in January. A normal year brings about 38 inches of snow; with the rain, that comes to about 16 inches of water.
On November 14 Brigham City normally reaches 50° and falls to 27°. The record high is 69°, in 2025; the record low 8°, in 1978. The most rain on this date, 0.59 in, fell in 2020.
Normals 1991–2020 and records since 1974 at Brigham City Waste Plant, here, 200 ft lower. NOAA, through RCC-ACIS.
