The Byron 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
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Partly cloudy
Chance of showers
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69° on Nov. 17, 2016, the hottest reading for this week of the year since 1996. Next is 68° in 2023.
Byron’s center stands about 1,060 ft above sea level. Within three miles the land runs from 910 ft to 1,130 ft, a difference of 220 ft: rolling country. The highest named summit within 15 miles is Dundee Mountain, about 1,250 ft, 14 miles east.
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 3 rock units mapped at the surface.
Heights every 0.1 mile from the Copernicus GLO-90 surface model; vertical exaggeration about 52×. 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 12 mi of the line.
Shale, dolostone. Age: Ordovician, 445 to 487 million years old. About 6 mi of the line.
Dolostone. Age: Ordovician, 445 to 487 million years old. About 4 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 Byron reaches Lake Michigan by way of Parsons Creek, the East Branch Fond Du Lac and the Fox River: about 85 river miles. From there it moves on through the Great Lakes, over Niagara Falls and down the St. Lawrence to the Atlantic.
Lake on the way: Lake Winnebago 6124.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Byron; river miles along the main stem, rounded.
Byron has a warm-summer humid continental climate. Summer afternoons average 82° in July; winter nights fall to about 11° in January. About 28 inches of rain fall in a normal year.
On November 14 Byron normally reaches 45° and falls to 29°. The record high is 64°, in 2025; the record low 10°, in 1996. The most rain on this date, 0.10 in, fell in 2024.
Normals 1991–2020 and records since 1996 at Fond Du Lac County Airport, 8 miles north-northwest, 260 ft lower. NOAA, through RCC-ACIS.
