The Evanston 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 cloudy
Partly cloudy; warmer
Mostly cloudy
Showers likely
Partly cloudy; cooler
Showers likely
Showers likely
69° on Nov. 15, 1999, the hottest reading for this week of the year since 1890. Next is 66° in 1967.
Evanston’s center stands about 6,750 ft above sea level. Within three miles the land runs from 6,650 ft to 7,280 ft, a difference of 630 ft: hilly country. The highest named summit within 15 miles is Medicine Butte, about 8,600 ft, 6 miles north-northeast.
Under the town center the state geologic map shows Alluvium and Colluvium (clay, silt, sand), from the Pleistocene to Holocene, less than 2.6 million years old.
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 12×. The colored band under the surface is the rock the state geologic map shows at the surface, not a picture of what lies beneath.
Mudstone, sandstone. Age: Eocene, 34 to 56 million years old. About 13 mi of the line.
Clay, silt, sand. Age: Pleistocene to Holocene, less than 2.6 million years old. About 5 mi of the line.
Sandstone, siltstone. Age: Eocene, 34 to 56 million years old. About 3 mi of the line.
Mudstone, sandstone, conglomerate. Age: Early Cretaceous, 100 to 145 million years old. About 2 mi of the line.
Sandstone-mudstone. Age: Early Eocene to Middle Eocene, 38 to 56 million years old. About 0.7 mi of the line.
Siltstone, sandstone, lignite. Age: Late Cretaceous to Paleocene, 56 to 100 million years old. About 0.7 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 Evanston reaches Great Salt Lake by way of the Bear River: about 440 river miles. Great Salt Lake has no outlet to the sea: the water leaves only by evaporating or soaking into the ground.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Evanston; river miles along the main stem, rounded.
Evanston has a warm-summer humid continental climate. Summer afternoons average 81° in July; winter nights fall to about 11° in January. About 12 inches of rain fall in a normal year.
On November 14 Evanston normally reaches 44° and falls to 20°. The record high is 66°, in 1999; the record low −5°, in 1924. The most rain on this date, 0.38 in, fell in 1955.
Normals 1991–2020 and records since 1890 at Evanston 1 E, here, 110 ft higher. NOAA, through RCC-ACIS.
