The Stockton 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.
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−3° on Nov. 12, 2019, the coldest reading for this week of the year since 1943. Next is −2° in 1959.
Stockton’s center stands about 990 ft above sea level. Within three miles the land runs from 830 ft to 1,140 ft, a difference of 310 ft: rolling country. The highest named summit within 15 miles is Benton Mound, about 1,260 ft, 3 miles north-northwest.
Under the town center the state geologic map shows Maquoketa Formation or Group (shale, limestone), from the Late Ordovician, 445 to 454 million years old.
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 42×. The colored band under the surface is the rock the state geologic map shows at the surface, not a picture of what lies beneath.
Dolostone, limestone. Age: Late Ordovician, 447 to 459 million years old. About 19 mi of the line.
Shale, limestone. Age: Late Ordovician, 445 to 454 million years old. About 5 mi of the line.
Dolostone, limestone. Age: Silurian, 422 to 445 million years old. About 0.4 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 Stockton reaches the Gulf of America by way of Yellow Creek, the Pecatonica, the Rock River and the Mississippi: about 1,710 river miles.
1,450 miles of the trip are on the Mississippi.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Stockton; river miles along the main stem, rounded.
Stockton has a warm-summer humid continental climate. Summer afternoons average 82° in July; winter nights fall to about 12° in January. A normal year brings about 36 inches of snow; with the rain, that comes to about 39 inches of water.
On November 14 Stockton normally reaches 46° and falls to 30°. The record high is 70°, in 1989; the record low 7°, in 1986. The most rain on this date, 0.77 in, fell in 1980.
Normals 1991–2020 and records since 1943 at Stockton 3 NNE, 3 miles north. NOAA, through RCC-ACIS.
