The Henrietta 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
Mostly cloudy
Mostly sunny; warmer
Mostly sunny
Partly cloudy
Partly cloudy
8° on Nov. 16, 1933, the coldest reading for this week of the year since 1871. Next is 10° in 1905.
Henrietta’s center stands about 600 ft above sea level. Within three miles the land runs from 500 ft to 730 ft, a difference of 230 ft: rolling country. The highest named summit within 15 miles is Hopper Hills, about 1,160 ft, 10 miles southeast.
Under the town center the state geologic map shows Vernon Formation (shale), from the Silurian, 422 to 428 million years old.
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 31×. The colored band under the surface is the rock the state geologic map shows at the surface, not a picture of what lies beneath.
Shale. Age: Silurian, 422 to 428 million years old. About 5 mi of the line.
Shale. Age: Silurian, 422 to 428 million years old. About 4 mi of the line.
Dolostone. Age: Silurian, 425 to 428 million years old. About 4 mi of the line.
Limestone. Age: Early Devonian to Middle Devonian, 388 to 410 million years old. About 3 mi of the line.
Dolostone. Age: Silurian, 422 to 428 million years old. About 2 mi of the line.
Shale. Age: Late Ordovician, 445 to 459 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. 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 Henrietta reaches Lake Ontario by way of Red Creek, the Erie Canal, the Clyde, the Seneca and the Oswego: about 130 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 Henrietta; river miles along the main stem, rounded.
Henrietta has a hot-summer humid continental climate. Summer afternoons average 83° in July; winter nights fall to about 19° in January. A normal year brings about 102 inches of snow; with the rain, that comes to about 35 inches of water.
On November 14 Henrietta normally reaches 50° and falls to 34°. The record high is 72°, in 1994; the record low 10°, in 1905. The most rain on this date, 1.13 in, fell in 1972.
Normals 1991–2020 and records since 1871 from the Rochester Area threaded record (Frederick Douglass Greater Rochester International Airport, 5 miles northwest). NOAA, through RCC-ACIS.
