The Mount Calvary 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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75° on Nov. 17, 1931, the hottest reading for this week of the year since 1893. Next is 71° in 1927.
Mount Calvary’s center stands about 930 ft above sea level. Within three miles the land runs from 910 ft to 1,060 ft, a difference of 150 ft: gently rolling country. The highest named summit within 15 miles is Dundee Mountain, about 1,250 ft, 12 miles south-southeast.
Under the town center the state geologic map shows Silurian, undivided (dolostone), 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 38×. 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.
Shale, dolostone. Age: Ordovician, 445 to 487 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 Mount Calvary reaches Lake Michigan by way of the Sheboygan: about 70 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 Mount Calvary; river miles along the main stem, rounded.
Mount Calvary has a warm-summer humid continental climate. Summer afternoons average 80° in July; winter nights fall to about 9° in January. A normal year brings about 38 inches of snow; with the rain, that comes to about 31 inches of water.
On November 14 Mount Calvary normally reaches 43° and falls to 28°. The record high is 69°, in 1971; the record low 1°, in 1916. The most rain on this date, 0.80 in, fell in 1957.
Normals 1991–2020 and records since 1893 at Fond Du Lac Wwtp, 11 miles west, 180 ft lower. NOAA, through RCC-ACIS.
