The Ellenburg 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.
Ellenburg’s center stands about 960 ft above sea level. Within three miles the land runs from 820 ft to 1,390 ft, a difference of 570 ft: hilly country. The highest named summit within 15 miles is Lyon Mountain, about 3,840 ft, 13 miles south.
Under the town center the state geologic map shows Potsdam Sandstone, from the Cambrian, 487 to 497 million 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 8×. The colored band under the surface is the rock the state geologic map shows at the surface, not a picture of what lies beneath.
Sandstone. Age: Cambrian, 487 to 497 million years old. About 13 mi of the line.
Gneiss. Age: Mesoproterozoic, 1 to 1.6 billion years old. About 5 mi of the line.
Charnockite, gneiss. 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.
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 Ellenburg 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 Ellenburg; river miles along the main stem, rounded.
Ellenburg 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 Ellenburg 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, 13 miles south-southeast, 380 ft higher. NOAA, through RCC-ACIS.
