The Hamlin 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.
91° on Nov. 16, 2025, the hottest reading for this week of the year since 1898. Next is 88° in 2021.
Hamlin’s center stands about 1,730 ft above sea level. Within three miles the land runs from 1,690 ft to 1,770 ft, a difference of 80 ft: gently rolling country. The highest named summit within 15 miles is Skinout Mountain, about 1,920 ft, 11 miles south-southeast.
Under the town center the state geologic map shows Quaternary deposit, undivided (coarse-detrital, fine-detrital), 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 48×. The colored band under the surface is the rock the state geologic map shows at the surface, not a picture of what lies beneath.
Coarse-detrital, fine-detrital. Age: Quaternary, less than 2.6 million years old. About 14 mi of the line.
Shale. Age: Permian, 252 to 299 million years old. About 8 mi of the line.
Sand. Age: Pleistocene to Holocene, less than 2.6 million years old. About 0.5 mi of the line.
Sandstone-mudstone. Age: Permian, 252 to 299 million years old. About 0.4 mi of the line.
Claystone. Age: Permian, 252 to 299 million years old. About 0.3 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 Hamlin reaches the Gulf of America by way of California Creek, Paint Creek, the Clear Fork and the Brazos: about 950 river miles.
Lakes on the way: Possum Kingdom Lake and 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 Hamlin; river miles along the main stem, rounded.
Hamlin has a humid subtropical climate. Summer afternoons average 96° in July; winter nights fall to about 29° in January. About 25 inches of rain fall in a normal year, with about 4 inches of snow.
On November 14 Hamlin normally reaches 67° and falls to 40°. The record high is 85°, in 1989; the record low 14°, in 1976. The most rain on this date, 0.37 in, fell in 2004.
Normals 1991–2020 and records since 1898 at Anson, 16 miles east-southeast. NOAA, through RCC-ACIS.