The Indio 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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25° on Nov. 11, 1950, the coldest reading for this week of the year since 1894. Next is 25° in 1958.
Indio’s center stands about 13 ft below sea level. Within three miles the land runs from -60 ft to 160 ft, a difference of 220 ft: rolling country. The highest named summit within 15 miles is Martinez Mountain, about 6,500 ft, 14 miles south-southwest.
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 4×. The colored band under the surface is the rock the state geologic map shows at the surface, not a picture of what lies beneath.
Coarse-detrital. Age: Pleistocene to Holocene, less than 2.6 million years old. About 14 mi of the line.
Gneiss. Age: Paleoproterozoic to Miocene, 5.3 to 2,500 million years old. About 5 mi of the line.
Coarse-detrital. Age: Pleistocene, less than 2.6 million years old. About 2 mi of the line.
Plutonic, gneiss. Age: Paleoproterozoic to Late Cretaceous, 66 to 2,500 million years old. About 2 mi of the line.
Sandstone, conglomerate. Age: Miocene to Pleistocene, less than 23 million years old. About 0.8 mi of the line.
Coarse-detrital. Age: Quaternary, less than 2.6 million years old. About 0.7 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.
Indio has a hot desert climate. Summer afternoons average 106° in July; winter nights fall to about 45° in December. About 3 inches of rain fall in a normal year.
On November 14 Indio normally reaches 79° and falls to 53°. The record high is 95°, in 1967; the record low 32°, in 1932. The most rain on this date, 0.25 in, fell in 1918.
Normals 1991–2020 and records since 1894 at Indio Fire Station, here. NOAA, through RCC-ACIS.
