The Perrin 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; cooler
Chance of showers
Sunny; warmer
Partly cloudy
Partly cloudy
Partly cloudy
90° on Nov. 16, 2025, the hottest reading for this week of the year since 1941. Next is 87° in 1955.
Perrin’s center stands about 1,050 ft above sea level. Within three miles the land runs from 1,000 ft to 1,180 ft, a difference of 180 ft: gently rolling country. The highest named summit within 15 miles is Slipdown Mountain, about 1,370 ft, 11 miles southeast.
Under the town center the state geologic map shows Wolf Mountain Shale (black-shale), from the Carboniferous, 299 to 324 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 57×. The colored band under the surface is the rock the state geologic map shows at the surface, not a picture of what lies beneath.
Black-shale. Age: Carboniferous, 299 to 324 million years old. About 10 mi of the line.
Claystone, sandstone. Age: Early Cretaceous, 100 to 145 million years old. About 8 mi of the line.
Fine-detrital, coarse-detrital. Age: Holocene, less than 12,000 years old. About 2 mi of the line.
Limestone, marlstone. Age: Early Cretaceous, 100 to 145 million years old. About 2 mi of the line.
Coarse-detrital, fine-detrital. Age: Quaternary, less than 2.6 million years old. About 1 mi of the line.
Limestone. Age: Carboniferous, 299 to 324 million years old. About 0.6 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 Perrin reaches the Gulf of America by way of Two Bush Branch, East Fork Keechi Creek, Keechi Creek and the Brazos: about 690 river miles.
Lake on the way: Lake Granbury.
550 miles of the trip are on the Brazos.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Perrin; river miles along the main stem, rounded.
Perrin has a humid subtropical climate. Summer afternoons average 96° in July; winter nights fall to about 29° in January. About 33 inches of rain fall in a normal year.
On November 14 Perrin normally reaches 66° and falls to 41°. The record high is 87°, in 1960; the record low 15°, in 2018. The most rain on this date, 1.48 in, fell in 1991.
Normals 1991–2020 and records since 1941 at Jacksboro, 13 miles north-northwest. NOAA, through RCC-ACIS.
