The Hartley 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
Mostly cloudy
Partly cloudy
Partly cloudy
Sunny
Partly cloudy
Mostly sunny
87° on Nov. 17, 2017, the hottest reading for this week of the year since 1948. Next is 85° in 1973.
Hartley’s center stands about 3,910 ft above sea level. Within three miles the land runs from 3,880 ft to 3,950 ft, a difference of 70 ft: gently rolling country.
The section below crosses 3 rock units mapped at the surface.
Heights every 0.1 mile from the Copernicus GLO-90 surface model; vertical exaggeration about 41×. The colored band under the surface is the rock the state geologic map shows at the surface, not a picture of what lies beneath.
Sand. Age: Pleistocene, less than 2.6 million years old. About 20 mi of the line.
Sand, clay. Age: Pliocene, 2.6 to 5.3 million years old. About 2 mi of the line.
Sand. Age: Late Miocene to Pliocene, 2.6 to 12 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.
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.
Hartley has a cold semi-arid climate. Summer afternoons average 94° in July; winter nights fall to about 21° in January. A normal year brings about 20 inches of snow; with the rain, that comes to about 16 inches of water.
On November 14 Hartley normally reaches 61° and falls to 30°. The record high is 84°, in 2025; the record low 5°, in 1959. The most rain on this date, 0.82 in, fell in 1961.
Normals 1991–2020 and records since 1948 at Dalhart Faa Airport, 13 miles northwest. NOAA, through RCC-ACIS.
