The Vernon 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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78° on Nov. 15, 1993, the hottest reading for this week of the year since 1905. Next is 74° in 1909.
Vernon’s center stands about 370 ft above sea level. Within three miles the land runs from 170 ft to 850 ft, a difference of 680 ft: hilly country. The highest named summit within 15 miles is Bald Mountain, about 1,140 ft, 12 miles north-northeast.
Under the town center the state geologic map shows Glastonbury Gneiss, from the Middle Ordovician, 459 to 471 million years old.
The section below crosses 5 rock units mapped at the surface.
Heights every 0.1 mile from the Copernicus GLO-90 surface model; vertical exaggeration about 19×. The colored band under the surface is the rock the state geologic map shows at the surface, not a picture of what lies beneath.
Arkose, siltstone. Age: Early Jurassic, 175 to 202 million years old. About 11 mi of the line.
Gneiss. Age: Middle Ordovician, 459 to 471 million years old. About 7 mi of the line.
Schist, quartzite. Age: Devonian, 359 to 422 million years old. About 3 mi of the line.
Gneiss, granofels. Age: Middle Ordovician, 459 to 471 million years old. About 2 mi of the line.
Gneiss, amphibolite. Age: Early Ordovician to Middle Ordovician, 459 to 487 million years old. About 1 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 Vernon reaches Long Island Sound and the Atlantic Ocean by way of the Hockanum and the Connecticut: about 65 river miles.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Vernon; river miles along the main stem, rounded.
Vernon has a hot-summer humid continental climate. Summer afternoons average 85° in July; winter nights fall to about 19° in January. A normal year brings about 52 inches of snow; with the rain, that comes to about 47 inches of water.
On November 14 Vernon normally reaches 52° and falls to 33°. The record high is 74°, in 1973; the record low 15°, in 2019. The most rain on this date, 1.87 in, fell in 1972.
Normals 1991–2020 and records since 1905 from the Hartford Area threaded record (Hartford-Bradley International Airport, 13 miles northwest, 200 ft lower). NOAA, through RCC-ACIS.
