The Summit 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.
Partly cloudy
Partly cloudy
Mostly cloudy
Showers likely; cooler
Partly cloudy
Showers likely
Showers likely
75° on Nov. 15, 2016, the hottest reading for this week of the year since 1948. Next is 73° in 1999.
Summit’s center stands about 5,970 ft above sea level. Within three miles the land runs from 5,740 ft to 7,910 ft, a difference of 2,170 ft: mountain country. The highest named summit within 15 miles is Brian Head, about 11,300 ft, 10 miles south-southeast.
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 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.
Unconsolidated. Age: Quaternary, less than 2.6 million years old. About 10 mi of the line.
Volcanic. Age: Eocene to Miocene, 5.3 to 56 million years old. About 6 mi of the line.
Sandstone-mudstone, sandstone. Age: Late Cretaceous, 72 to 94 million years old. About 4 mi of the line.
Basalt. Age: Quaternary, less than 2.6 million years old. About 2 mi of the line.
Limestone, mudstone. Age: Late Paleocene to Early Oligocene, 28 to 59 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.
Summit has a cold semi-arid climate. Summer afternoons average 91° in July; winter nights fall to about 16° in December. About 11 inches of rain fall in a normal year.
On November 14 Summit normally reaches 54° and falls to 24°. The record high is 71°, in 2016; the record low 0°, in 1964. The most rain on this date, 1.02 in, fell in 1987.
Normals 1991–2020 and records since 1948 at Cedar City Airport, 11 miles southwest, 380 ft lower. NOAA, through RCC-ACIS.
