The Woburn 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 1872. Next is 76° in 1909.
Woburn’s center stands about 110 ft above sea level. Within three miles the land runs from 30 ft to 310 ft, a difference of 280 ft: rolling country. The highest named summit within 15 miles is Prospect Hill, about 480 ft, 8 miles southwest.
Under the town center the state geologic map shows Diorite and gabbro (diorite, gabbro), from the Neoproterozoic, 542 to 1,000 million years old.
The section below crosses 11 rock units mapped at the surface.
Heights every 0.1 mile from the Copernicus GLO-90 surface model; vertical exaggeration about 63×. The colored band under the surface is the rock the state geologic map shows at the surface, not a picture of what lies beneath.
Rhyolite, felsic-volcanic. Age: Neoproterozoic, 593 to 599 million years old. About 3 mi of the line.
Metavolcanic. Age: Neoproterozoic, 542 to 1,000 million years old. About 3 mi of the line.
Granite, pegmatite. Age: Ordovician to Silurian, 422 to 487 million years old. About 3 mi of the line.
Diorite, gabbro. Age: Neoproterozoic, 542 to 1,000 million years old. About 2 mi of the line.
Schist, gneiss. Age: Neoproterozoic to Ordovician, 445 to 1,000 million years old. About 2 mi of the line.
Argillite. Age: Neoproterozoic to Early Cambrian, 521 to 1,000 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. 5 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 Woburn reaches Boston Harbor and the Atlantic Ocean by way of Cummings Brook, Fowle Brook, the Malden, Horn Pond Brook and the Mystic: about 13 river miles.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Woburn; river miles along the main stem, rounded.
Woburn has a hot-summer humid continental climate. Summer afternoons average 82° in July; winter nights fall to about 23° in January. A normal year brings about 49 inches of snow; with the rain, that comes to about 44 inches of water.
On November 14 Woburn normally reaches 52° and falls to 38°. The record high is 71°, in 1993; the record low 16°, in 1905. The most rain on this date, 1.49 in, fell in 2009.
Normals 1991–2020 and records since 1872 from the Boston Area threaded record (Boston Logan International Airport, 11 miles southeast). NOAA, through RCC-ACIS.
