The Hoffman 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
Mostly sunny; warmer
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Mostly sunny
Partly cloudy
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8° on Nov. 12, 2019, the coldest reading for this week of the year since 1962. Next is 9° in 1986.
Hoffman’s center stands about 460 ft above sea level. Within three miles the land runs from 430 ft to 510 ft, a difference of 80 ft: gently rolling country. The highest named summit within 15 miles is Creeds Hill, about 610 ft, 12 miles east-southeast.
Under the town center the state geologic map shows Bond Formation (shale, sandstone, limestone), from the Late Pennsylvanian, 304 to 307 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 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.
Shale, sandstone, limestone. Age: Late Pennsylvanian, 304 to 307 million years old. About 15 mi of the line.
Shale, limestone. Age: Late Pennsylvanian, 304 to 307 million years old. About 6 mi of the line.
Shale. Age: Late Pennsylvanian, 304 to 307 million years old. About 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 Hoffman reaches the Gulf of America by way of Lost Creek, Crooked Creek, the Kaskaskia and the Mississippi: about 1,180 river miles.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Hoffman; river miles along the main stem, rounded.
Hoffman has a hot-summer humid continental climate. Summer afternoons average 88° in July; winter nights fall to about 21° in January. About 46 inches of rain fall in a normal year.
On November 14 Hoffman normally reaches 56° and falls to 36°. The record high is 80°, in 1999; the record low 12°, in 1986. The most rain on this date, 2.20 in, fell in 1993.
Normals 1991–2020 and records since 1962 at Carlyle Reservoir, 8 miles northwest. NOAA, through RCC-ACIS.
