The St. Charles 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.
Sunny
Sunny; warmer
Mostly sunny
Sunny
Sunny
Mostly sunny
Mostly sunny
86° on Nov. 16, 1993, the hottest reading for this week of the year since 1933. Next is 85° in 1955.
St. Charles’s center stands about 180 ft above sea level. Within three miles the land runs from 140 ft to 210 ft, a difference of 70 ft: gently rolling country. The highest named summit within 15 miles is Spring Hill, about 460 ft, 13 miles west-northwest.
Under the town center the state geologic map shows Duplin Formation (sand, clay), from the Pliocene, 2.6 to 5.3 million years old.
The section below crosses 4 rock units mapped at the surface.
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.
Sand, clay. Age: Pliocene, 2.6 to 5.3 million years old. About 9 mi of the line.
Sand, limestone. Age: Tertiary, 2.6 to 66 million years old. About 8 mi of the line.
Sand, gravel. Age: Quaternary, less than 2.6 million years old. About 5 mi of the line.
Clay, sand. Age: Late Cretaceous, 66 to 72 million years old. About 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 St. Charles reaches the Atlantic Ocean by way of the Black River: about 140 river miles.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of St. Charles; river miles along the main stem, rounded.
St. Charles has a humid subtropical climate. Summer afternoons average 92° in July; winter nights fall to about 33° in January. About 47 inches of rain fall in a normal year.
On November 14 St. Charles normally reaches 67° and falls to 40°. The record high is 81°, in 1989; the record low 22°, in 2013. The most rain on this date, 0.98 in, fell in 2016.
Normals 1991–2020 and records since 1933 at Bishopville 1.4 ENE, 10 miles north. NOAA, through RCC-ACIS.
