The Aguanga 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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88° on Nov. 13, 1999, the hottest reading for this week of the year since 1942. Next is 88° in 2016.
Aguanga’s center stands about 1,950 ft above sea level. Within three miles the land runs from 1,770 ft to 3,470 ft, a difference of 1,700 ft: steep hill country. The highest named summit within 15 miles is High Point, about 6,120 ft, 6 miles south-southeast.
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 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.
Tonalite. Age: Middle Jurassic to Late Cretaceous, 66 to 175 million years old. About 14 mi of the line.
Coarse-detrital. Age: Pleistocene to Holocene, less than 2.6 million years old. About 4 mi of the line.
Schist, gneiss. Age: Paleoproterozoic to Cretaceous, 66 to 2,500 million years old. About 3 mi of the line.
Coarse-detrital. Age: Pleistocene, less than 2.6 million years old. About 2 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 Aguanga reaches the Pacific Ocean by way of Tule Creek, Temecula Creek and the Santa Margarita: about 55 river miles.
Often dry. About 40% of the way is mapped as streams that run only after rain or snowmelt; the water makes the whole trip in floods.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Aguanga; river miles along the main stem, rounded.
Aguanga has a hot-summer Mediterranean climate. Summer afternoons average 94° in August; winter nights fall to about 29° in December. About 25 inches of rain fall in a normal year.
On November 14 Aguanga normally reaches 69° and falls to 34°. The record high is 87°, in 1999; the record low 20°, in 2000. The most rain on this date, 2.39 in, fell in 1946.
Normals 1991–2020 and records since 1942 at Henshaw Dam, 15 miles south-southeast, 750 ft higher. NOAA, through RCC-ACIS.
