The San Joaquin 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.
Mostly sunny
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Chance of showers; cooler
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Showers likely
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Mostly sunny
92° on Nov. 14, 1995, the hottest reading for this week of the year since 1942. Next is 85° in 2016.
San Joaquin’s center stands about 170 ft above sea level. Within three miles the land runs from 160 ft to 180 ft, a difference of 20 ft: nearly flat ground.
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.
Heights every 0.1 mile from the Copernicus GLO-90 surface model; vertical exaggeration about 64×. 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 24 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 San Joaquin reaches San Francisco Bay and the Pacific Ocean by way of the San Joaquin and New York Slough: about 220 river miles.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of San Joaquin; river miles along the main stem, rounded.
San Joaquin has a cold desert climate. Summer afternoons average 99° in July; winter nights fall to about 36° in December. Barely 0.0 inches of rain fall in a normal year.
On November 14 San Joaquin normally reaches 70° and falls to 42°. The record high is 92°, in 1995; the record low 28°, in 1961. The most rain on this date, 1.25 in, fell in 1953.
Normals 1991–2020 and records since 1942 at Five Points 5 SSW, 17 miles south, 120 ft higher. NOAA, through RCC-ACIS.
