The Howards Grove 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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69° on Nov. 16, 2023, the hottest reading for this week of the year since 1996. Next is 68° in 1999.
Howards Grove’s center stands about 700 ft above sea level. Within three miles the land runs from 670 ft to 820 ft, a difference of 150 ft: gently rolling country.
Under the town center the state geologic map shows Silurian, undivided (dolostone), from the Silurian, 422 to 445 million years old.
Heights every 0.1 mile from the Copernicus GLO-90 surface model; vertical exaggeration about 31×. 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. Age: Silurian, 422 to 445 million years old. About 17 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 Howards Grove reaches Lake Michigan by way of the Pigeon: about 14 river miles. From there it moves on through the Great Lakes, over Niagara Falls and down the St. Lawrence to the Atlantic.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Howards Grove; river miles along the main stem, rounded.
Howards Grove has a warm-summer humid continental climate. Summer afternoons average 80° in July; winter nights fall to about 12° in January. About 29 inches of rain fall in a normal year.
On November 14 Howards Grove normally reaches 45° and falls to 29°. The record high is 62°, in 2025; the record low 12°, in 1996. The most rain on this date, 0.18 in, fell in 2024.
Normals 1991–2020 and records since 1996 at Sheboygan County Memorial Airport, 4 miles south-southwest. NOAA, through RCC-ACIS.
