The Montague 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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13° on Nov. 12, 2020, the coldest reading for this week of the year since 1948. Next is 16° in 2014.
Montague’s center stands about 2,530 ft above sea level. Within three miles the land runs from 2,440 ft to 2,810 ft, a difference of 370 ft: rolling country. The highest named summit within 15 miles is Cottonwood Peak, about 6,580 ft, 13 miles north-northwest.
Under the town center the state geologic map shows Quaternary alluvium and marine deposits (coarse-detrital), from the Pleistocene to Holocene, less than 2.6 million years old.
The section below crosses 8 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.
Andesite, basalt. Age: Late Oligocene to Pleistocene, 2 to 24 million years old. About 10 mi of the line.
Coarse-detrital. Age: Pleistocene to Holocene, less than 2.6 million years old. About 5 mi of the line.
Mafic-volcanic, greenstone. Age: Paleozoic to Mesozoic, 66 to 542 million years old. About 2 mi of the line.
Schist, gneiss. Age: Paleoproterozoic to Cretaceous, 66 to 2,500 million years old. About 2 mi of the line.
Melange. Age: Devonian to Jurassic, 145 to 422 million years old. About 2 mi of the line.
Dacite, andesite. Age: Pleistocene to Holocene, less than 2.6 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. 2 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 Montague reaches the Pacific Ocean by way of the Oregon Slu, the Shasta and the Klamath: about 190 river miles.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Montague; river miles along the main stem, rounded.
Montague has a hot-summer Mediterranean climate. Summer afternoons average 93° in July; winter nights fall to about 26° in January. About 12 inches of rain fall in a normal year.
On November 14 Montague normally reaches 55° and falls to 30°. The record high is 65°, in 2019; the record low 20°, in 2018. The most rain on this date, 0.38 in, fell in 1948.
Normals 1991–2020 and records since 1948 at Montague Siskiyou Airport, 5 miles northeast, 120 ft higher. NOAA, through RCC-ACIS.
