The Deary 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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70° on Nov. 11, 1999, the hottest reading for this week of the year since 1915. Next is 69° in 2016.
Deary’s center stands about 2,870 ft above sea level. Within three miles the land runs from 2,630 ft to 3,600 ft, a difference of 970 ft: steep hill country. The highest named summit within 15 miles is Beals Butte, about 5,020 ft, 10 miles north-northeast.
The section below crosses 6 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.
Basalt, basaltic-andesite. Age: Early Miocene to Late Miocene, 6 to 18 million years old. About 11 mi of the line.
Metasiltstone, quartzite. Age: Mesoproterozoic, 1 to 1.6 billion years old. About 4 mi of the line.
Dacite, andesite, rhyolite. Age: Eocene, 34 to 56 million years old. About 4 mi of the line.
Granodiorite, granite. Age: Early Cretaceous to Late Cretaceous, 67 to 107 million years old. About 3 mi of the line.
Metasiltstone, argillite. Age: Mesoproterozoic, 1 to 1.6 billion years old. About 2 mi of the line.
Paragneiss, biotite-schist. Age: Mesoproterozoic, 1 to 1.6 billion years old. About 0.8 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 Deary reaches the Pacific Ocean by way of Mount Deary Creek, Big Bear Creek, the Potlatch, the Clearwater, the Snake and the Columbia: about 500 river miles.
Lake on the way: Lake Umatilla.
210 miles of the trip are on the Columbia.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Deary; river miles along the main stem, rounded.
Deary has a dry-summer warm-summer continental climate. Summer afternoons average 84° in August; winter nights fall to about 25° in December. A normal year brings about 41 inches of snow; with the rain, that comes to about 24 inches of water.
On November 14 Deary normally reaches 45° and falls to 30°. The record high is 60°, in 2025; the record low −12°, in 1955. The most rain on this date, 0.65 in, fell in 1998.
Normals 1991–2020 and records since 1915 at Potlatch 3 NNE, 18 miles northwest, 110 ft lower. NOAA, through RCC-ACIS.
