The Wilmington 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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73° on Nov. 11, 2020, the hottest reading for this week of the year since 1987. Next is 73° in 2022.
Wilmington’s center stands about 1,530 ft above sea level. Within three miles the land runs from 1,490 ft to 2,380 ft, a difference of 890 ft: hilly country. The highest named summit within 15 miles is Glastenbury Mountain, about 3,770 ft, 13 miles northwest.
The section below crosses 17 rock units mapped at the surface.
Heights every 0.1 mile from the Copernicus GLO-90 surface model; vertical exaggeration about 9×. The colored band under the surface is the rock the state geologic map shows at the surface, not a picture of what lies beneath.
Gneiss. Age: Mesoproterozoic, 1.2 to 1.6 billion years old. About 4 mi of the line.
Schist. Age: Mesoproterozoic, 1.2 to 1.4 billion years old. About 3 mi of the line.
Granofels. Age: Neoproterozoic to Early Cambrian, 521 to 1,000 million years old. About 3 mi of the line.
Phyllite, mica-schist. Age: Silurian to Early Devonian, 394 to 425 million years old. About 2 mi of the line.
Quartz-feldspar-schist. Age: Cambrian to Early Ordovician, 471 to 542 million years old. About 1 mi of the line.
Mica-schist, phyllite. Age: Neoproterozoic to Early Cambrian, 521 to 1,000 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. 11 smaller units along the line are not listed.
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 Wilmington reaches Long Island Sound and the Atlantic Ocean by way of the North Branch Deerfield, the Deerfield and the Connecticut: about 180 river miles.
120 miles of the trip are on the Connecticut.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Wilmington; river miles along the main stem, rounded.
Wilmington has a warm-summer humid continental climate. Summer afternoons average 81° in July; winter nights fall to about 14° in January. About 42 inches of rain fall in a normal year.
On November 14 Wilmington normally reaches 49° and falls to 30°. The record high is 63°, in 2011; the record low 16°, in 2019. The most rain on this date, 0.65 in, fell in 2000.
Normals 1991–2020 and records since 1987 at North Adams Harriman Airport, 19 miles southwest, 880 ft lower. NOAA, through RCC-ACIS.
