The Indian Head Park 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.
74° on Nov. 13, 1989, the hottest reading for this week of the year since 1980. Next is 74° in 2016.
Indian Head Park’s center stands about 710 ft above sea level. Within three miles the land runs from 500 ft to 740 ft, a difference of 240 ft: rolling country.
Under the town center the state geologic map shows Silurian System undivided (dolostone, limestone), from the Silurian, 422 to 445 million years old.
Heights every 0.1 mile from the Copernicus GLO-90 surface model; vertical exaggeration about 53×. 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: Silurian, 422 to 445 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 Indian Head Park reaches the Gulf of America by way of Flag Creek, the Des Plaines, the Illinois and the Mississippi: about 1,500 river miles.
Lake on the way: Peoria Lake.
1,190 miles of the trip are on the Mississippi.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Indian Head Park; river miles along the main stem, rounded.
Indian Head Park has a hot-summer humid continental climate. Summer afternoons average 85° in July; winter nights fall to about 20° in January. A normal year brings about 39 inches of snow; with the rain, that comes to about 41 inches of water.
On November 14 Indian Head Park normally reaches 50° and falls to 36°. The record high is 68°, in 2025; the record low 15°, in 1986. The most rain on this date, 1.60 in, fell in 1989.
Normals 1991–2020 and records since 1980 at Chicago Midway Airport 3 SW, 7 miles east-southeast. NOAA, through RCC-ACIS.