The Boise City 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.
Showers likely
Mostly cloudy
Mostly sunny; warmer
Partly cloudy
Mostly sunny
Partly cloudy
Mostly sunny
86° on Nov. 12, 2005, the hottest reading for this week of the year since 1954. Next is 85° in 1973.
Boise City’s center stands about 4,170 ft above sea level. Within three miles the land runs from 4,110 ft to 4,220 ft, a difference of 110 ft: gently rolling country.
Under the town center the state geologic map shows Ogallala Formation (fine-detrital, coarse-detrital), from the Pliocene, 2.6 to 5.3 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 44×. The colored band under the surface is the rock the state geologic map shows at the surface, not a picture of what lies beneath.
Fine-detrital, coarse-detrital. Age: Pliocene, 2.6 to 5.3 million years old. About 22 mi of the line.
Fine-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.
Boise City has a cold semi-arid climate. Summer afternoons average 92° in July; winter nights fall to about 19° in January. A normal year brings about 25 inches of snow; with the rain, that comes to about 17 inches of water.
On November 14 Boise City normally reaches 59° and falls to 28°. The record high is 83°, in 1999; the record low 12°, in 2014. The most rain on this date, 0.57 in, fell in 1993.
Normals 1991–2020 and records since 1954 at Campo 7 S, 19 miles north. NOAA, through RCC-ACIS.
