The Franklin 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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26° on Nov. 17, 1961, the coldest reading for this week of the year since 1856. Next is 27° in 1958.
Franklin’s center stands about 17 ft above sea level. Within three miles the land runs from 0 ft to 30 ft, a difference of 30 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.
The section below crosses 2 rock units mapped at the surface.
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 19 mi of the line.
Sandstone, conglomerate. Age: Miocene to Pleistocene, less than 23 million years old. About 4 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 Franklin reaches San Francisco Bay and the Pacific Ocean by way of Snodgrass Slough, the North Mokelumne, the San Joaquin and New York Slough: about 50 river miles.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Franklin; river miles along the main stem, rounded.
Franklin has a hot-summer Mediterranean climate. Summer afternoons average 93° in July; winter nights fall to about 38° in December. About 18 inches of rain fall in a normal year.
On November 14 Franklin normally reaches 66° and falls to 43°. The record high is 81°, in 2010; the record low 27°, in 1978. The most rain on this date, 0.88 in, fell in 1963.
Normals 1991–2020 and records since 1856 from the Sacramento Area threaded record (Sacramento Airport Asos, 9 miles north-northwest). NOAA, through RCC-ACIS.
