The Dennis 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
Chance of showers
Sunny; warmer
Partly cloudy
Partly cloudy
Partly cloudy
88° on Nov. 16, 2025, the hottest reading for this week of the year since 1902. Next is 87° in 1938.
Dennis’s center stands about 730 ft above sea level. Within three miles the land runs from 720 ft to 870 ft, a difference of 150 ft: gently rolling country. The highest named summit within 15 miles is Double Mountain, about 1,180 ft, 13 miles west-southwest.
The section below crosses 9 rock units mapped at the surface.
Heights every 0.1 mile from the Copernicus GLO-90 surface model; vertical exaggeration about 40×. The colored band under the surface is the rock the state geologic map shows at the surface, not a picture of what lies beneath.
Claystone, sandstone. Age: Early Cretaceous, 100 to 145 million years old. About 7 mi of the line.
Black-shale. Age: Carboniferous, 299 to 324 million years old. About 7 mi of the line.
Sandstone. Age: Early Cretaceous, 100 to 145 million years old. About 4 mi of the line.
Limestone, marlstone. Age: Early Cretaceous, 100 to 145 million years old. About 2 mi of the line.
Limestone. Age: Early Cretaceous, 100 to 113 million years old. About 2 mi of the line.
Sand. Age: Pleistocene to Holocene, less than 2.6 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. 3 smaller units 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 Dennis reaches the Gulf of America by way of Rocky Run and the Brazos: about 590 river miles.
Lake on the way: Lake Granbury.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Dennis; river miles along the main stem, rounded.
Dennis has a humid subtropical climate. Summer afternoons average 95° in July; winter nights fall to about 32° in January. About 35 inches of rain fall in a normal year.
On November 14 Dennis normally reaches 67° and falls to 43°. The record high is 85°, in 1989; the record low 18°, in 2018. The most rain on this date, 1.46 in, fell in 1923.
Normals 1991–2020 and records since 1902 at Weatherford, 13 miles northeast, 230 ft higher. NOAA, through RCC-ACIS.
