The Plainville 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.
Partly cloudy
Mostly sunny; warmer
Partly cloudy
Mostly sunny
Sunny
Mostly sunny
Mostly sunny
6° on Nov. 14, 2019, the coldest reading for this week of the year since 1932. Next is 10° in 1986.
Plainville’s center stands about 200 ft above sea level. Within three miles the land runs from 170 ft to 640 ft, a difference of 470 ft: hilly country. The highest named summit within 15 miles is Cotton Hill, about 1,200 ft, 14 miles northwest.
Under the town center the state geologic map shows New Haven Arkose, from the Late Triassic to Early Jurassic, 175 to 237 million years old.
The section below crosses 10 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.
Schist, granofels. Age: Silurian to Devonian, 359 to 445 million years old. About 6 mi of the line.
Arkose, siltstone. Age: Early Jurassic, 175 to 202 million years old. About 5 mi of the line.
Arkose. Age: Late Triassic to Early Jurassic, 175 to 237 million years old. About 5 mi of the line.
Siltstone, shale. Age: Early Jurassic, 175 to 202 million years old. About 4 mi of the line.
Basalt, gabbro. Age: Early Jurassic, 175 to 202 million years old. About 2 mi of the line.
Gneiss, amphibolite. Age: Middle Ordovician, 459 to 471 million years old. About 2 mi of the line.
From the USGS State Geologic Map Compilation (Horton and others, 2017), the states’ geologic maps joined at a common scale. 4 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 Plainville reaches Long Island Sound and the Atlantic Ocean by way of the Quinnipiac: about 40 river miles.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Plainville; river miles along the main stem, rounded.
Plainville has a hot-summer humid continental climate. Summer afternoons average 84° in July; winter nights fall to about 17° in January. A normal year brings about 39 inches of snow; with the rain, that comes to about 54 inches of water.
On November 14 Plainville normally reaches 53° and falls to 33°. The record high is 72°, in 1993; the record low 6°, in 2019. The most rain on this date, 1.00 in, fell in 1970.
Normals 1991–2020 and records since 1932 at Burlington, 9 miles north-northwest, 300 ft higher. NOAA, through RCC-ACIS.
