The Lyndon 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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Mostly sunny; warmer
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Partly cloudy
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Chance of showers
72° on Nov. 11, 1964, the hottest reading for this week of the year since 1893. Next is 71° in 2001.
Lyndon’s center stands about 980 ft above sea level. Within three miles the land runs from 830 ft to 1,230 ft, a difference of 400 ft: hilly country. The highest named summit within 15 miles is Potato Hill, about 1,300 ft, 11 miles west.
Under the town center the state geologic map shows Cambrian, undivided (sandstone), from the Cambrian, 487 to 542 million years old.
Heights every 0.1 mile from the Copernicus GLO-90 surface model; vertical exaggeration about 39×. The colored band under the surface is the rock the state geologic map shows at the surface, not a picture of what lies beneath.
Sandstone. Age: Cambrian, 487 to 542 million years old. About 24 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 Lyndon reaches the Gulf of America by way of Gilmore Creek, the Wisconsin and the Mississippi: about 1,760 river miles.
Lake on the way: Lake Wisconsin.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Lyndon; river miles along the main stem, rounded.
Lyndon has a warm-summer humid continental climate. Summer afternoons average 82° in July; winter nights fall to about 8° in January. A normal year brings about 44 inches of snow; with the rain, that comes to about 40 inches of water.
On November 14 Lyndon normally reaches 46° and falls to 28°. The record high is 70°, in 1971; the record low −4°, in 1916. The most rain on this date, 0.40 in, fell in 2010.
Normals 1991–2020 and records since 1893 at Reedsburg Wwtp, 12 miles south-southwest, 100 ft lower. NOAA, through RCC-ACIS.
