The Bartlett 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; warmer
Mostly sunny
Mostly sunny
Partly cloudy
Mostly sunny
Partly cloudy
78° on Nov. 14, 1971, the hottest reading for this week of the year since 1871. Next is 74° in 1911.
Bartlett’s center stands about 770 ft above sea level. Within three miles the land runs from 740 ft to 860 ft, a difference of 120 ft: gently 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.
The section below crosses 2 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.
Dolostone, limestone. Age: Silurian, 422 to 445 million years old. About 22 mi of the line.
Shale, limestone. Age: Late Ordovician, 445 to 454 million years old. About 2 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 Bartlett reaches the Gulf of America by way of the West Branch Du Page, the Du Page, the Des Plaines, the Illinois and the Mississippi: about 1,520 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 Bartlett; river miles along the main stem, rounded.
Bartlett has a hot-summer humid continental climate. Summer afternoons average 85° in July; winter nights fall to about 19° in January. A normal year brings about 38 inches of snow; with the rain, that comes to about 38 inches of water.
On November 14 Bartlett normally reaches 49° and falls to 35°. The record high is 78°, in 1971; the record low 14°, in 1916. The most rain on this date, 1.19 in, fell in 1926.
Normals 1991–2020 and records since 1871 from the Chicago Area threaded record (Chicago Ohare International Airport, 13 miles east). NOAA, through RCC-ACIS.
