The Lamar 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.
Mostly cloudy
Partly cloudy
Mostly sunny
Partly cloudy
Partly cloudy
Partly cloudy
Chance of showers; warmer
81° on Nov. 15, 2025, the hottest reading for this week of the year since 1893. Next is 80° in 1941.
Lamar’s center stands about 3,520 ft above sea level. Within three miles the land runs from 3,470 ft to 3,560 ft, a difference of 90 ft: gently rolling country.
Under the town center the state geologic map shows Ogallala Group or Formation (siltstone-mudstone, conglomerate-sandstone), from the Miocene, 5.3 to 23 million years old.
The section below crosses 2 rock units mapped at the surface.
Heights every 0.1 mile from the Copernicus GLO-90 surface model; vertical exaggeration about 56×. The colored band under the surface is the rock the state geologic map shows at the surface, not a picture of what lies beneath.
Siltstone-mudstone, conglomerate-sandstone. Age: Miocene, 5.3 to 23 million years old. About 16 mi of the line.
Sandstone, conglomerate. Age: Miocene to Pliocene, 2.6 to 23 million years old. About 8 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 Lamar reaches the Gulf of America by way of Walnut Slough, Frenchman Creek, the Republican, the Kansas, the Missouri and the Mississippi: about 2,170 river miles.
Lake on the way: Harlan County Lake.
1,170 miles of the trip are on the Mississippi.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Lamar; river miles along the main stem, rounded.
Lamar has a hot-summer humid continental climate. Summer afternoons average 91° in July; winter nights fall to about 12° in January. A normal year brings about 26 inches of snow; with the rain, that comes to about 20 inches of water.
On November 14 Lamar normally reaches 54° and falls to 22°. The record high is 78°, in 2025; the record low −7°, in 2014. The most rain on this date, 0.56 in, fell in 1993.
Normals 1991–2020 and records since 1893 at Imperial, 18 miles east-southeast, 230 ft lower. NOAA, through RCC-ACIS.
