The Chickasha 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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90° on Nov. 16, 2025, the hottest reading for this week of the year since 1953. Next is 84° in 1999.
Chickasha’s center stands about 1,100 ft above sea level. Within three miles the land runs from 1,070 ft to 1,190 ft, a difference of 120 ft: gently rolling country.
Under the town center the state geologic map shows Alluvium (fine-detrital), from the Holocene, less than 12,000 years old.
The section below crosses 7 rock units mapped at the surface.
Heights every 0.1 mile from the Copernicus GLO-90 surface model; vertical exaggeration about 61×. The colored band under the surface is the rock the state geologic map shows at the surface, not a picture of what lies beneath.
Conglomerate, shale, siltstone. Age: Permian, 252 to 299 million years old. About 7 mi of the line.
Fine-detrital. Age: Holocene, less than 12,000 years old. About 4 mi of the line.
Sandstone, siltstone. Age: Permian, 252 to 299 million years old. About 4 mi of the line.
Sandstone. Age: Permian, 252 to 299 million years old. About 4 mi of the line.
Sandstone, conglomerate. Age: Permian, 252 to 299 million years old. About 2 mi of the line.
Shale. Age: Permian, 252 to 299 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. 1 smaller unit 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 Chickasha reaches the Gulf of America by way of the Washita, the Red River, the Atchafalaya and the Lower Atchafalaya: about 1,050 river miles.
680 miles of the trip are on the Red River.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Chickasha; river miles along the main stem, rounded.
Chickasha has a humid subtropical climate. Summer afternoons average 97° in July; winter nights fall to about 27° in January. About 37 inches of rain fall in a normal year, with about 5 inches of snow.
On November 14 Chickasha normally reaches 65° and falls to 39°. The record high is 83°, in 2025; the record low 17°, in 1959. The most rain on this date, 0.74 in, fell in 1993.
Normals 1991–2020 and records since 1953 at Chickasha Experiment Station, here. NOAA, through RCC-ACIS.
