The Larkin 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 sunny
Mostly sunny
Mostly sunny
Partly cloudy
Partly cloudy
Partly cloudy
Showers likely
79° on Nov. 14, 1999, the hottest reading for this week of the year since 1971. Next is 72° in 2001.
Larkin’s center stands about 1,640 ft above sea level. Within three miles the land runs from 1,560 ft to 1,760 ft, a difference of 200 ft: gently rolling country.
Under the town center the state geologic map shows Undifferentiated (conglomerate, sandstone, mudstone), from the Late Cretaceous, 72 to 100 million years old.
Heights every 0.1 mile from the Copernicus GLO-90 surface model; vertical exaggeration about 64×. The colored band under the surface is the rock the state geologic map shows at the surface, not a picture of what lies beneath.
Conglomerate, sandstone, mudstone. Age: Late Cretaceous, 72 to 100 million years old. About 24 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 Larkin reaches the Gulf of America by way of Kanaranzi Creek, the Rock River, the Big Sioux, the Missouri and the Mississippi: about 2,070 river miles.
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 Larkin; river miles along the main stem, rounded.
Larkin has a warm-summer humid continental climate. Summer afternoons average 82° in July; winter nights fall to about 5° in January. A normal year brings about 45 inches of snow; with the rain, that comes to about 30 inches of water.
On November 14 Larkin normally reaches 42° and falls to 24°. The record high is 79°, in 1999; the record low −4°, in 1986. The most rain on this date, 0.30 in, fell in 2024.
Normals 1991–2020 and records since 1971 at Worthington 2 NNE, 16 miles east-southeast. NOAA, through RCC-ACIS.
