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.
Sunny
Partly cloudy; warmer
Sunny
Sunny
Partly cloudy
Partly cloudy
Partly cloudy
3° on Nov. 17, 1959, the coldest reading for this week of the year since 1901. Next is 5° in 2019.
Plainville’s center stands about 700 ft above sea level. Within three miles the land runs from 520 ft to 760 ft, a difference of 240 ft: rolling country.
Under the town center the state geologic map shows Warsaw Formation and Salem Limestone, from the Middle Mississippian, 331 to 347 million years old.
The section below crosses 9 rock units mapped at the surface.
Heights every 0.1 mile from the Copernicus GLO-90 surface model; vertical exaggeration about 53×. The colored band under the surface is the rock the state geologic map shows at the surface, not a picture of what lies beneath.
Limestone. Age: Early Mississippian to Middle Mississippian, 331 to 359 million years old. About 5 mi of the line.
Limestone. Age: Middle Mississippian, 331 to 347 million years old. About 5 mi of the line.
Shale, sandstone, coal. Age: Middle Pennsylvanian to Late Pennsylvanian, 304 to 315 million years old. About 4 mi of the line.
Sandstone. Age: Late Cretaceous, 72 to 84 million years old. About 4 mi of the line.
Clay, silt, sand. Age: Holocene, less than 12,000 years old. About 2 mi of the line.
Shale. Age: Middle Devonian to Late Devonian, 359 to 388 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. 3 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 the Gulf of America by way of the The Sny and the Mississippi: about 1,290 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 86° in July; winter nights fall to about 19° in January. About 36 inches of rain fall in a normal year.
On November 14 Plainville normally reaches 52° and falls to 34°. The record high is 76°, in 2025; the record low 9°, in 1940. The most rain on this date, 1.03 in, fell in 1926.
Normals 1991–2020 and records since 1901 from the Quincy Area threaded record (Quincy Regional Airport, 11 miles north). NOAA, through RCC-ACIS.
