The Perry 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.
Perry’s center stands about 4,310 ft above sea level. Within three miles the land runs from 4,200 ft to 7,200 ft, a difference of 3,000 ft: mountain country. The highest named summit within 15 miles is Ben Lomond, about 9,660 ft, 8 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 5 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.
Mixed-clastic. Age: Mesoproterozoic to Neoproterozoic, 542 to 1,600 million years old. About 7 mi of the line.
Unconsolidated. Age: Quaternary, less than 2.6 million years old. About 6 mi of the line.
Peat. Age: Holocene, less than 12,000 years old. About 6 mi of the line.
Quartzite. Age: Paleoproterozoic, 1.6 to 2.5 billion years old. About 2 mi of the line.
Clay. Age: Pleistocene, less than 2.6 million years old. About 2 mi of the line.
From the USGS State Geologic Map Compilation (Horton and others, 2017), the states’ geologic maps joined at a common scale.
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 Perry reaches Great Salt Lake by way of the Reeder Overflow and the Bear River: about 18 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 Perry; river miles along the main stem, rounded.
Perry 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 Perry 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, 4 miles north. NOAA, through RCC-ACIS.
