The Danville 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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76° on Nov. 11, 2020, the hottest reading for this week of the year since 1963. Next is 74° in 1993.
Danville’s center stands about 220 ft above sea level. Within three miles the land runs from 130 ft to 380 ft, a difference of 250 ft: rolling country. The highest named summit within 15 miles is Mount Pawtuckaway, about 990 ft, 15 miles north-northwest.
Under the town center the state geologic map shows Merrimack Group, Eliot Formation (phyllite, quartzite, mica-schist), from the Ordovician to Silurian, 422 to 487 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 30×. The colored band under the surface is the rock the state geologic map shows at the surface, not a picture of what lies beneath.
Phyllite, quartzite, mica-schist. Age: Ordovician to Silurian, 422 to 487 million years old. About 7 mi of the line.
Granofels, biotite-schist. Age: Ordovician to Silurian, 422 to 487 million years old. About 5 mi of the line.
Metaclastic. Age: Silurian, 422 to 445 million years old. About 4 mi of the line.
Phyllite. Age: Silurian, 422 to 445 million years old. About 3 mi of the line.
Schist, granofels. Age: Ordovician to Silurian, 422 to 487 million years old. About 2 mi of the line.
Gneiss, biotite-schist, granofels. Age: Neoproterozoic, 542 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. 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 Danville reaches the Atlantic Ocean by way of the Powwow and the Merrimack: about 30 river miles.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Danville; river miles along the main stem, rounded.
Danville has a warm-summer humid continental climate. Summer afternoons average 82° in July; winter nights fall to about 14° in January. A normal year brings about 57 inches of snow; with the rain, that comes to about 46 inches of water.
On November 14 Danville normally reaches 50° and falls to 30°. The record high is 72°, in 1989; the record low 7°, in 1986. The most rain on this date, 1.25 in, fell in 2006.
Normals 1991–2020 and records since 1963 at Epping, 8 miles north-northeast. NOAA, through RCC-ACIS.
