The Washington 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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14° on Nov. 16, 1933, the coldest reading for this week of the year since 1873. Next is 15° in 1959.
Washington’s center stands about 1,320 ft above sea level. Within three miles the land runs from 1,170 ft to 1,560 ft, a difference of 390 ft: rolling country. The highest named summit within 15 miles is Pleasant Hill, about 1,620 ft, 11 miles east-southeast.
Under the town center the state geologic map shows Venango Formation (siltstone, conglomerate), from the Late Devonian, 359 to 384 million years old.
The section below crosses 7 rock units mapped at the surface.
Heights every 0.1 mile from the Copernicus GLO-90 surface model; vertical exaggeration about 23×. The colored band under the surface is the rock the state geologic map shows at the surface, not a picture of what lies beneath.
Siltstone, conglomerate. Age: Late Devonian, 359 to 384 million years old. About 8 mi of the line.
Shale. Age: Late Devonian, 359 to 384 million years old. About 4 mi of the line.
Shale. Age: Late Devonian, 359 to 384 million years old. About 4 mi of the line.
Siltstone, shale. Age: Late Devonian, 359 to 384 million years old. About 3 mi of the line.
Siltstone, shale. Age: Carboniferous, 324 to 359 million years old. About 2 mi of the line.
Sandstone, shale. Age: Late Devonian, 359 to 384 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. 1 smaller unit 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 Washington reaches the Gulf of America by way of Conneauttee Creek, French Creek, the Allegheny, the Ohio and the Mississippi: about 2,130 river miles.
970 miles of the trip are on the Ohio.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Washington; river miles along the main stem, rounded.
Washington has a hot-summer humid continental climate. Summer afternoons average 81° in July; winter nights fall to about 21° in January. A normal year brings about 104 inches of snow; with the rain, that comes to about 43 inches of water.
On November 14 Washington normally reaches 51° and falls to 37°. The record high is 73°, in 1994; the record low 18°, in 1905. The most rain on this date, 1.27 in, fell in 2011.
Normals 1991–2020 and records since 1873 from the Erie Area threaded record (Erie International Airport, 14 miles north-northwest, 590 ft lower). NOAA, through RCC-ACIS.
