The Bergen 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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71° on Nov. 15, 2025, the hottest reading for this week of the year since 1977. Next is 70° in 1999.
Bergen’s center stands about 990 ft above sea level. Within three miles the land runs from 960 ft to 1,030 ft, a difference of 70 ft: gently rolling country.
Under the town center the state geologic map shows Claystone, siltstone, and sandstone (claystone, siltstone, sandstone), from the Early Cretaceous, 100 to 113 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 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.
Sandstone, siltstone, shale. Age: Cambrian, 487 to 497 million years old. About 9 mi of the line.
Claystone, siltstone, sandstone. Age: Early Cretaceous, 100 to 113 million years old. About 6 mi of the line.
Granodiorite, granite. Age: Paleoproterozoic, 1.6 to 1.8 billion years old. About 4 mi of the line.
Sandstone, siltstone. Age: Mesoproterozoic, 1 to 1.2 billion years old. About 2 mi of the line.
Sandstone, siltstone, shale. Age: Middle Cambrian to Cambrian, 487 to 521 million years old. About 2 mi of the line.
Volcanic, sedimentary, hypabyssal. Age: Paleoproterozoic, 1.6 to 2.5 billion years old. About 0.8 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 Bergen reaches the Gulf of America by way of Silver Creek, the South Fork Crow, the Crow and the Mississippi: about 1,920 river miles.
Lake on the way: Lake Pepin.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Bergen; river miles along the main stem, rounded.
Bergen has a cold desert climate. Summer afternoons average 83° in July; winter nights fall to about 4° in January. Barely 0.0 inches of rain fall in a normal year.
On November 14 Bergen normally reaches 42° and falls to 25°. The record high is 68°, in 1990; the record low 3°, in 2018. The most rain on this date, 0.75 in, fell in 1996.
Normals 1991–2020 and records since 1977 at Delano, 20 miles northeast. NOAA, through RCC-ACIS.
