The Leyden 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.
Mostly cloudy
Partly cloudy; warmer
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70° on Nov. 11, 2020, the hottest reading for this week of the year since 1949. Next is 66° in 1956.
Leyden’s center stands about 1,180 ft above sea level. Within three miles the land runs from 990 ft to 1,770 ft, a difference of 780 ft: hilly country. The highest named summit within 15 miles is Gomer Hill, about 2,140 ft, 9 miles north-northwest.
Under the town center the state geologic map shows Trenton Group (limestone), from the Middle Ordovician, 459 to 471 million years old.
The section below crosses 4 rock units mapped at the surface.
Heights every 0.1 mile from the Copernicus GLO-90 surface model; vertical exaggeration about 19×. The colored band under the surface is the rock the state geologic map shows at the surface, not a picture of what lies beneath.
Limestone. Age: Middle Ordovician, 459 to 471 million years old. About 13 mi of the line.
Siltstone, shale. Age: Late Ordovician, 445 to 459 million years old. About 7 mi of the line.
Black-shale. Age: Middle Ordovician, 459 to 471 million years old. About 3 mi of the line.
Sandstone. Age: Late Ordovician, 445 to 459 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.
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 Leyden reaches Lake Ontario by way of the Sugar and the Black River: about 90 river miles. From the lake it goes down the St. Lawrence to the Atlantic.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Leyden; river miles along the main stem, rounded.
Leyden has a warm-summer humid continental climate. Summer afternoons average 75° in July; winter nights fall to about 8° in January. A normal year brings about 164 inches of snow; with the rain, that comes to about 58 inches of water.
On November 14 Leyden normally reaches 42° and falls to 26°. The record high is 61°, in 2010; the record low −1°, in 2019. The most rain on this date, 0.95 in, fell in 1961.
Normals 1991–2020 and records since 1949 at Boonville 4 SSW, 7 miles south, 370 ft higher. NOAA, through RCC-ACIS.
