The Circleville 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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75° on Nov. 16, 2016, the hottest reading for this week of the year since 1981. Next is 72° in 1999.
Circleville’s center stands about 6,070 ft above sea level. Within three miles the land runs from 6,020 ft to 6,930 ft, a difference of 910 ft: steep hill country. The highest named summit within 15 miles is Delano Peak, about 12,140 ft, 15 miles north-northwest.
Under the town center the state geologic map shows Alluvium and colluvium (unconsolidated), from the Quaternary, less than 2.6 million years old.
The section below crosses 4 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.
Felsic-volcanic. Age: Late Oligocene to Middle Miocene, 12 to 28 million years old. About 13 mi of the line.
Unconsolidated. Age: Quaternary, less than 2.6 million years old. About 7 mi of the line.
Basalt. Age: Early Miocene to Middle Miocene, 12 to 23 million years old. About 2 mi of the line.
Unconsolidated. Age: Pleistocene to Holocene, less than 2.6 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.
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 Circleville reaches Sevier Lake by way of the Sevier: about 310 river miles. Sevier 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 Circleville; river miles along the main stem, rounded.
Circleville has a cold semi-arid climate. Summer afternoons average 85° in July; winter nights fall to about 6° in December. A normal year brings about 20 inches of snow; with the rain, that comes to about 9 inches of water.
On November 14 Circleville normally reaches 52° and falls to 16°. The record high is 72°, in 1999; the record low 2°, in 2000. The most rain on this date, 0.16 in, fell in 1987.
Normals 1991–2020 and records since 1981 at Angle, 18 miles east-northeast, 340 ft higher. NOAA, through RCC-ACIS.
