The Richmond 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.
Partly cloudy
Partly cloudy; warmer
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Mostly sunny
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6° on Nov. 11, 1956, the coldest reading for this week of the year since 1949. Next is 7° in 1986.
Richmond’s center stands about 1,080 ft above sea level. Within three miles the land runs from 660 ft to 1,410 ft, a difference of 750 ft: hilly country. The highest named summit within 15 miles is Monadnock Mountain, about 3,130 ft, 11 miles northeast.
Under the town center the state geologic map shows Granite, granodiorite, and tonalite (granite, granodiorite, tonalite), from the Late Ordovician, 445 to 459 million years old.
The section below crosses 14 rock units mapped at the surface.
Heights every 0.1 mile from the Copernicus GLO-90 surface model; vertical exaggeration about 11×. 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. Age: Late Ordovician to Silurian, 440 to 454 million years old. About 3 mi of the line.
Pelitic-schist, metasandstone. Age: Silurian, 434 to 445 million years old. About 3 mi of the line.
Metaclastic. Age: Silurian, 434 to 445 million years old. About 3 mi of the line.
Granite, granodiorite, tonalite. Age: Late Ordovician, 445 to 459 million years old. About 2 mi of the line.
Felsic-volcanic, mafic-volcanic. Age: Middle Ordovician to Late Ordovician, 445 to 471 million years old. About 2 mi of the line.
Amphibolite, gneiss, quartzite. Age: Late Ordovician, 449 to 453 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. 8 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 Richmond reaches Long Island Sound and the Atlantic Ocean by way of Rice Brook, Martin Brook, the South Branch Ashuelot, the Ashuelot and the Connecticut: about 180 river miles.
140 miles of the trip are on the Connecticut.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Richmond; river miles along the main stem, rounded.
Richmond has a hot-summer humid continental climate. Summer afternoons average 85° in July; winter nights fall to about 14° in January. A normal year brings about 52 inches of snow; with the rain, that comes to about 47 inches of water.
On November 14 Richmond normally reaches 50° and falls to 32°. The record high is 67°, in 1964; the record low 7°, in 1986. The most rain on this date, 1.89 in, fell in 2022.
Normals 1991–2020 and records since 1949 at Tully Lake, 8 miles south-southeast, 400 ft lower. NOAA, through RCC-ACIS.
