The Manchester 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 1885. Next is 74° in 2022.
Manchester’s center stands about 260 ft above sea level. Within three miles the land runs from 130 ft to 560 ft, a difference of 430 ft: hilly country. The highest named summit within 15 miles is Fort Mountain, about 1,400 ft, 15 miles north-northeast.
Under the town center the state geologic map shows Massabesic Gneiss Complex (gneiss, biotite-schist, granofels), from the Neoproterozoic, 542 to 1,000 million years old.
The section below crosses 7 rock units mapped at the surface.
Heights every 0.1 mile from the Copernicus GLO-90 surface model; vertical exaggeration about 24×. The colored band under the surface is the rock the state geologic map shows at the surface, not a picture of what lies beneath.
Gneiss, biotite-schist, granofels. Age: Neoproterozoic, 542 to 1,000 million years old. About 7 mi of the line.
Granite. Age: Late Devonian, 359 to 384 million years old. About 6 mi of the line.
Granofels, biotite-schist. Age: Ordovician to Silurian, 422 to 487 million years old. About 4 mi of the line.
Schist, granofels. Age: Ordovician to Silurian, 422 to 487 million years old. About 3 mi of the line.
Metaclastic. Age: Silurian, 434 to 445 million years old. About 2 mi of the line.
Pelitic-schist, metasandstone. Age: Silurian, 434 to 445 million years old. About 1 mi of the line.
From the USGS State Geologic Map Compilation (Horton and others, 2017), the states’ geologic maps joined at a common scale. 1 smaller unit 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 Manchester reaches the Atlantic Ocean by way of the Merrimack: about 70 river miles.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Manchester; river miles along the main stem, rounded.
Manchester has a hot-summer humid continental climate. Summer afternoons average 84° in July; winter nights fall to about 17° in January. About 40 inches of rain fall in a normal year.
On November 14 Manchester normally reaches 51° and falls to 33°. The record high is 66°, in 2011; the record low 16°, in 2019. The most rain on this date, 1.77 in, fell in 2009.
Normals 1991–2020 and records since 1885 from the Manchester Area threaded record (Manchester Airport, 5 miles south-southeast). NOAA, through RCC-ACIS.
