The Greenwich 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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Partly cloudy; warmer
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70° on Nov. 15, 1956, the hottest reading for this week of the year since 1893. Next is 69° in 1909.
Greenwich’s center stands about 710 ft above sea level. Within three miles the land runs from 280 ft to 880 ft, a difference of 600 ft: hilly country. The highest named summit within 15 miles is Grass Mountain, about 3,100 ft, 14 miles east-southeast.
Under the town center the state geologic map shows Mettawee Slate (slate, quartzite, conglomerate), from the Neoproterozoic to Cambrian, 487 to 1,000 million years old.
The section below crosses 9 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.
Black-shale. Age: Middle Ordovician, 459 to 471 million years old. About 9 mi of the line.
Phyllite, metasiltstone. Age: Neoproterozoic to Cambrian, 487 to 1,000 million years old. About 5 mi of the line.
Shale. Age: Cambrian, 487 to 542 million years old. About 3 mi of the line.
Argillite, mudstone. Age: Late Ordovician, 445 to 459 million years old. About 2 mi of the line.
Slate, quartzite, conglomerate. Age: Neoproterozoic to Cambrian, 487 to 1,000 million years old. About 2 mi of the line.
Slate, phyllite. Age: Early Ordovician to Middle Ordovician, 459 to 487 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. 3 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 Greenwich reaches New York Harbor and the Atlantic Ocean by way of Hartshorn Brook, Batten Kill and the Hudson: about 190 river miles.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Greenwich; river miles along the main stem, rounded.
Greenwich has a warm-summer humid continental climate. Summer afternoons average 82° in July; winter nights fall to about 10° in January. About 38 inches of rain fall in a normal year.
On November 14 Greenwich normally reaches 47° and falls to 28°. The record high is 67°, in 1973; the record low 5°, in 1905. The most rain on this date, 1.45 in, fell in 2009.
Normals 1991–2020 and records since 1893 from the Glens Falls Area threaded record (Glens Falls/Floyd Bennett Memorial Airport, 15 miles north-northwest, 390 ft lower). NOAA, through RCC-ACIS.
