The Hanover 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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71° on Nov. 11, 2002, the hottest reading for this week of the year since 1884. Next is 69° in 1909.
Hanover’s center stands about 540 ft above sea level. Within three miles the land runs from 380 ft to 1,210 ft, a difference of 830 ft: hilly country. The highest named summit within 15 miles is Grantham Mountain, about 2,650 ft, 15 miles south-southeast.
Under the town center the state geologic map shows Ammonoosuc Volcanics of Billings (1935) - undivided (metavolcanic, metasedimentary), from the Middle Ordovician to Late Ordovician, 445 to 471 million years old.
The section below crosses 12 rock units mapped at the surface.
Heights every 0.1 mile from the Copernicus GLO-90 surface model; vertical exaggeration about 12×. The colored band under the surface is the rock the state geologic map shows at the surface, not a picture of what lies beneath.
Metavolcanic, metasedimentary. Age: Middle Ordovician to Late Ordovician, 445 to 471 million years old. About 6 mi of the line.
Granite, aplite. Age: Late Ordovician, 445 to 459 million years old. About 3 mi of the line.
Mica-schist, quartzite. Age: Early Devonian, 394 to 422 million years old. About 3 mi of the line.
Phyllite, limestone. Age: Silurian to Early Devonian, 394 to 425 million years old. About 3 mi of the line.
Quartzite. Age: Early Devonian, 394 to 422 million years old. About 3 mi of the line.
Muscovite-schist, metagraywacke. Age: Silurian to Early Devonian, 394 to 425 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. 6 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 Hanover reaches Long Island Sound and the Atlantic Ocean by way of Girl Brook and the Connecticut: about 220 river miles.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Hanover; river miles along the main stem, rounded.
Hanover has a hot-summer humid continental climate. Summer afternoons average 84° in July; winter nights fall to about 13° in January. A normal year brings about 61 inches of snow; with the rain, that comes to about 40 inches of water.
On November 14 Hanover normally reaches 48° and falls to 31°. The record high is 66°, in 1973; the record low 6°, in 1905. The most rain on this date, 1.19 in, fell in 2007.
Normals 1991–2020 and records since 1884 at Hanover, here. NOAA, through RCC-ACIS.
