The Oostburg 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.
Oostburg’s center stands about 700 ft above sea level. Within three miles the land runs from 570 ft to 740 ft, a difference of 170 ft: gently rolling country.
Under the town center the state geologic map shows Traverse Group (limestone, shale), from the Middle Devonian, 384 to 394 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 44×. 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 11 mi of the line.
Limestone, shale. Age: Middle Devonian, 384 to 394 million years old. About 3 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 Oostburg reaches Lake Michigan by way of the Black River: about 9 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 Oostburg; river miles along the main stem, rounded.
Oostburg 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 Oostburg 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, 11 miles north-northwest. NOAA, through RCC-ACIS.
