The Cyril 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.
Chance of showers
Showers likely
Partly cloudy; warmer
Mostly sunny
Partly cloudy
Mostly cloudy
Chance of showers
90° on Nov. 16, 2025, the hottest reading for this week of the year since 1953. Next is 84° in 1999.
Cyril’s center stands about 1,370 ft above sea level. Within three miles the land runs from 1,270 ft to 1,490 ft, a difference of 220 ft: rolling country.
Under the town center the state geologic map shows Weatherford Gypsum Bed of Rush Springs Formation (gypsum, dolostone), from the Permian, 252 to 299 million years old.
The section below crosses 6 rock units mapped at the surface.
Heights every 0.1 mile from the Copernicus GLO-90 surface model; vertical exaggeration about 54×. The colored band under the surface is the rock the state geologic map shows at the surface, not a picture of what lies beneath.
Sandstone. Age: Permian, 252 to 299 million years old. About 13 mi of the line.
Gypsum, dolostone. Age: Permian, 252 to 299 million years old. About 3 mi of the line.
Shale, gypsum, dolostone. Age: Permian, 252 to 299 million years old. About 3 mi of the line.
Shale, siltstone, sandstone. Age: Permian, 252 to 299 million years old. About 3 mi of the line.
Fine-detrital. Age: Holocene, less than 12,000 years old. About 2 mi of the line.
Sandstone, siltstone. Age: Permian, 252 to 299 million years old. About 0.5 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 Cyril reaches the Gulf of America by way of the Little Washita, the Washita, the Red River, the Atchafalaya and the Lower Atchafalaya: about 1,070 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 Cyril; river miles along the main stem, rounded.
Cyril 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 Cyril 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, 19 miles east-northeast, 280 ft lower. NOAA, through RCC-ACIS.
