The Dewey 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
Partly cloudy
Partly cloudy
Partly cloudy
Chance of showers
Chance of showers
70° on Nov. 16, 1953, the hottest reading for this week of the year since 1893. Next is 70° in 1964.
Dewey’s center stands about 1,140 ft above sea level. Within three miles the land runs from 1,110 ft to 1,230 ft, a difference of 120 ft: gently rolling country. The highest named summit within 15 miles is Blackberry Hill, about 1,380 ft, 6 miles northeast.
Under the town center the state geologic map shows Wolf River batholith; Red River Granite, from the Mesoproterozoic, 1 to 1.6 billion years old.
The section below crosses 8 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.
Granite. Age: Mesoproterozoic, 1 to 1.6 billion years old. About 9 mi of the line.
Granodiorite, tonalite. Age: Paleoproterozoic, 1.8 to 1.8 billion years old. About 5 mi of the line.
Mylonite. Age: Archean to Paleoproterozoic. About 2 mi of the line.
Dolostone. Age: Early Ordovician, 471 to 487 million years old. About 2 mi of the line.
Alkali-feldspar-granite. Age: Paleoproterozoic, 1.6 to 2.5 billion years old. About 2 mi of the line.
Granite. Age: Paleoproterozoic, 1.6 to 2.5 billion 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. 2 smaller units along the line are not listed.
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 Dewey reaches the Gulf of America by way of the Little Eau Claire, the Wisconsin and the Mississippi: about 1,850 river miles.
Lakes on the way: Petenwell Lake, Lake Wisconsin, Lake Du Bay and Wisconsin River Flowage 4964.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Dewey; river miles along the main stem, rounded.
Dewey has a warm-summer humid continental climate. Summer afternoons average 80° in July; winter nights fall to about 7° in January. A normal year brings about 49 inches of snow; with the rain, that comes to about 34 inches of water.
On November 14 Dewey normally reaches 42° and falls to 26°. The record high is 70°, in 1999; the record low −4°, in 1916. The most rain on this date, 0.96 in, fell in 1902.
Normals 1991–2020 and records since 1893 at Stevens Point, 9 miles south. NOAA, through RCC-ACIS.
