The Jacksonville 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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76° on Nov. 13, 2025, the hottest reading for this week of the year since 1911. Next is 75° in 1999.
Jacksonville’s center stands about 1,610 ft above sea level. Within three miles the land runs from 1,370 ft to 3,200 ft, a difference of 1,830 ft: steep hill country. The highest named summit within 15 miles is Bald Mountain, about 5,610 ft, 13 miles southeast.
The section below crosses 6 rock units mapped at the surface.
Heights every 0.1 mile from the Copernicus GLO-90 surface model; vertical exaggeration about 5×. The colored band under the surface is the rock the state geologic map shows at the surface, not a picture of what lies beneath.
Metaandesite, metabasalt, spilite. Age: Triassic to Jurassic, 145 to 252 million years old. About 16 mi of the line.
Quartz-diorite, diorite. Age: Late Jurassic to Early Cretaceous, 100 to 164 million years old. About 3 mi of the line.
Sand, gravel, silt. Age: Holocene, less than 12,000 years old. About 3 mi of the line.
Mudstone, graywacke. Age: Paleozoic to Jurassic, 145 to 542 million years old. About 2 mi of the line.
Sandstone, mudstone. Age: Early Cretaceous to Late Cretaceous, 66 to 145 million years old. About 0.4 mi of the line.
Mixed-clastic. Age: Pleistocene to Holocene, less than 2.6 million years old. About 0.3 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 Jacksonville reaches the Pacific Ocean by way of Daisy Creek, Griffin Creek, Bear Creek and the Rogue: about 140 river miles.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Jacksonville; river miles along the main stem, rounded.
Jacksonville has a hot-summer Mediterranean climate. Summer afternoons average 92° in July; winter nights fall to about 32° in January. About 18 inches of rain fall in a normal year, with about 3 inches of snow.
On November 14 Jacksonville normally reaches 54° and falls to 37°. The record high is 68°, in 1934; the record low 11°, in 1978. The most rain on this date, 1.43 in, fell in 1963.
Normals 1991–2020 and records since 1911 from the Medford Area threaded record (Medford International Airport, 6 miles northeast, 300 ft lower). NOAA, through RCC-ACIS.
