The Sunizona 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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85° on Nov. 11, 1973, the hottest reading for this week of the year since 1913. Next is 84° in 2017.
Sunizona’s center stands about 4,340 ft above sea level. Within three miles the land runs from 4,280 ft to 4,550 ft, a difference of 270 ft: rolling country. The highest named summit within 15 miles is Fife Peak, about 6,790 ft, 15 miles east.
Under the town center the state geologic map shows Quaternary surficial deposits, undivided (sand, silt, clay), from the Pleistocene to Holocene, less than 2 million years old.
The section below crosses 3 rock units mapped at the surface.
Heights every 0.1 mile from the Copernicus GLO-90 surface model; vertical exaggeration about 21×. The colored band under the surface is the rock the state geologic map shows at the surface, not a picture of what lies beneath.
Sand, silt, clay. Age: Pleistocene to Holocene, less than 2 million years old. About 21 mi of the line.
Conglomerate, sandstone. Age: Early Miocene to Pleistocene, 2 to 16 million years old. About 2 mi of the line.
Basalt, andesite, dacite. Age: Middle Eocene to Late Miocene, 11 to 38 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.
Sunizona has a cold semi-arid climate. Summer afternoons average 95° in June; winter nights fall to about 29° in January. About 12 inches of rain fall in a normal year, with about 1 inch of snow.
On November 14 Sunizona normally reaches 70° and falls to 36°. The record high is 84°, in 2017; the record low 22°, in 1915. The most rain on this date, 0.26 in, fell in 1959.
Normals 1991–2020 and records since 1913 at Pearce - Sunsites, 12 miles west-northwest. NOAA, through RCC-ACIS.
