The Hermon 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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75° on Nov. 11, 2020, the hottest reading for this week of the year since 1936. Next is 72° in 2012.
Hermon’s center stands about 580 ft above sea level. Within three miles the land runs from 490 ft to 830 ft, a difference of 340 ft: rolling country. The highest named summit within 15 miles is Huftle Hill, about 1,450 ft, 13 miles east-southeast.
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 20×. The colored band under the surface is the rock the state geologic map shows at the surface, not a picture of what lies beneath.
Marble. Age: Mesoproterozoic, 1 to 1.6 billion years old. About 5 mi of the line.
Gneiss. Age: Mesoproterozoic, 1 to 1.6 billion years old. About 4 mi of the line.
Paragneiss. Age: Mesoproterozoic, 1 to 1.6 billion years old. About 3 mi of the line.
Paragneiss. Age: Mesoproterozoic, 1 to 1.6 billion years old. About 3 mi of the line.
Gneiss. Age: Mesoproterozoic, 1 to 1.6 billion years old. About 2 mi of the line.
Marble. Age: Mesoproterozoic, 1 to 1.6 billion 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 Hermon reaches the St. Lawrence River by way of Tanner Creek, Harrison Creek, the Grass and the Saint Lawrence: about 75 river miles. The St. Lawrence carries it on to the Atlantic.
55 miles of the trip are on the Grass.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Hermon; river miles along the main stem, rounded.
Hermon has a warm-summer humid continental climate. Summer afternoons average 79° in July; winter nights fall to about 5° in January. A normal year brings about 92 inches of snow; with the rain, that comes to about 40 inches of water.
On November 14 Hermon normally reaches 46° and falls to 27°. The record high is 66°, in 1989; the record low −4°, in 2019. The most rain on this date, 0.70 in, fell in 1951.
Normals 1991–2020 and records since 1936 at Gouverneur 3 NW, 11 miles west-southwest, 160 ft lower. NOAA, through RCC-ACIS.
