The Dannemora 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.
Chance of showers
Mostly cloudy; warmer
Mostly cloudy
Mostly sunny
Mostly sunny
Partly cloudy
Partly cloudy
70° on Nov. 11, 2002, the hottest reading for this week of the year since 1906. Next is 70° in 2012.
Dannemora’s center stands about 1,570 ft above sea level. Within three miles the land runs from 1,510 ft to 2,540 ft, a difference of 1,030 ft: steep hill country. The highest named summit within 15 miles is Lyon Mountain, about 3,840 ft, 4 miles south-southwest.
Under the town center the state geologic map shows Pyroxene and/or hornblende granitic gneiss, from the Mesoproterozoic, 1 to 1.6 billion years old.
The section below crosses 3 rock units mapped at the surface.
Heights every 0.1 mile from the Copernicus GLO-90 surface model; vertical exaggeration about 7×. The colored band under the surface is the rock the state geologic map shows at the surface, not a picture of what lies beneath.
Charnockite, gneiss. Age: Mesoproterozoic, 1 to 1.6 billion years old. About 10 mi of the line.
Sandstone. Age: Cambrian, 487 to 497 million years old. About 9 mi of the line.
Gneiss. Age: Mesoproterozoic, 1 to 1.6 billion years old. About 5 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 Dannemora reaches the St. Lawrence River by way of the Great Chazy and the Richelieu: about 130 river miles. The St. Lawrence carries it on to the Atlantic.
Lake on the way: Lake Champlain.
80 miles of the trip are on the Richelieu.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Dannemora; river miles along the main stem, rounded.
Dannemora has a warm-summer humid continental climate. Summer afternoons average 79° in July; winter nights fall to about 9° in January. About 43 inches of rain fall in a normal year.
On November 14 Dannemora normally reaches 45° and falls to 28°. The record high is 64°, in 2011; the record low 3°, in 2019. The most rain on this date, 0.87 in, fell in 1937.
Normals 1991–2020 and records since 1906 at Dannemora, 6 miles east-southeast, 230 ft lower. NOAA, through RCC-ACIS.
