The San Buenaventura (Ventura) 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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95° on Nov. 12, 2021, the hottest reading for this week of the year since 1923. Next is 94° in 1949.
San Buenaventura (Ventura)’s center stands about 100 ft above sea level. Within three miles the land runs from 10 ft to 1,000 ft, a difference of 990 ft: steep hill country. Open water lies within three miles. The highest named summit within 15 miles is Sulphur Mountain, about 2,820 ft, 11 miles north-northeast.
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 4 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.
Sandstone, mudstone. Age: Miocene to Pleistocene, less than 23 million years old. About 8 mi of the line.
Coarse-detrital. Age: Pleistocene to Holocene, less than 2.6 million years old. About 3 mi of the line.
Sandstone, mudstone. Age: Oligocene to Pliocene, 2.6 to 34 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.
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.
Rain that falls on San Buenaventura (Ventura) runs straight into the Pacific Ocean.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of San Buenaventura (Ventura); river miles along the main stem, rounded.
San Buenaventura (Ventura) has a warm-summer Mediterranean climate. Summer afternoons average 79° in August; winter nights fall to about 45° in December. About 15 inches of rain fall in a normal year.
On November 14 San Buenaventura (Ventura) normally reaches 73° and falls to 49°. The record high is 94°, in 1949; the record low 35°, in 1932. The most rain on this date, 1.90 in, fell in 2025.
Normals 1991–2020 and records since 1923 from the Oxnard Area threaded record (Oxnard Wfo, 8 miles east-southeast). NOAA, through RCC-ACIS.
