The Plymouth 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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74° on Nov. 11, 2020, the hottest reading for this week of the year since 1907. Next is 69° in 1999.
Plymouth’s center stands about 1,270 ft above sea level. Within three miles the land runs from 1,200 ft to 1,880 ft, a difference of 680 ft: hilly country. The highest named summit within 15 miles is Muller Hill, about 2,050 ft, 14 miles northwest.
Under the town center the state geologic map shows Unadilla, Laurens, New Lisbon, and Gilboa Formations (shale, siltstone, sandstone), from the Middle Devonian, 384 to 394 million years old.
The section below crosses 3 rock units mapped at the surface.
Heights every 0.1 mile from the Copernicus GLO-90 surface model; vertical exaggeration about 20×. The colored band under the surface is the rock the state geologic map shows at the surface, not a picture of what lies beneath.
Shale, siltstone, sandstone. Age: Middle Devonian, 384 to 394 million years old. About 13 mi of the line.
Shale. Age: Late Devonian, 359 to 384 million years old. About 9 mi of the line.
Shale. Age: Middle Devonian to Late Devonian, 359 to 394 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.
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 Plymouth reaches Chesapeake Bay and the Atlantic Ocean by way of Canasawacta Creek, the Chenango and the Susquehanna: about 390 river miles.
Lake on the way: Lake Aldred.
290 miles of the trip are on the Susquehanna.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Plymouth; river miles along the main stem, rounded.
Plymouth has a warm-summer humid continental climate. Summer afternoons average 80° in July; winter nights fall to about 12° in January. A normal year brings about 77 inches of snow; with the rain, that comes to about 42 inches of water.
On November 14 Plymouth normally reaches 47° and falls to 29°. The record high is 65°, in 2010; the record low 7°, in 2019. The most rain on this date, 0.85 in, fell in 1916.
Normals 1991–2020 and records since 1907 at Sherburne, 6 miles northeast, 180 ft lower. NOAA, through RCC-ACIS.
