The Oulu 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 sunny
Mostly sunny; warmer
Partly cloudy
Partly cloudy
Mostly cloudy
Chance of showers
Showers likely
69° on Nov. 14, 1999, the hottest reading for this week of the year since 1928. Next is 67° in 1931.
Oulu’s center stands about 1,000 ft above sea level. Within three miles the land runs from 870 ft to 1,260 ft, a difference of 390 ft: rolling country. The highest named summit within 15 miles is Sugar Camp Hill, about 1,270 ft, 4 miles west-southwest.
Under the town center the state geologic map shows Bayfield Group; Chequamegon Sandstone (arkose), from the Mesoproterozoic, 1 to 1.6 billion years old.
The section below crosses 5 rock units mapped at the surface.
Heights every 0.1 mile from the Copernicus GLO-90 surface model; vertical exaggeration about 26×. The colored band under the surface is the rock the state geologic map shows at the surface, not a picture of what lies beneath.
Arkose, siltstone. Age: Mesoproterozoic, 1 to 1.6 billion years old. About 10 mi of the line.
Arkose. Age: Mesoproterozoic, 1 to 1.6 billion years old. About 6 mi of the line.
Basalt. Age: Mesoproterozoic, 1 to 1.6 billion years old. About 2 mi of the line.
Arkose. Age: Mesoproterozoic, 1 to 1.6 billion years old. About 1 mi of the line.
Sandstone. Age: Mesoproterozoic, 1 to 1.6 billion years old. About 1 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 Oulu reaches Lake Superior by way of Muskeg Creek and the Iron: about 13 river miles. From there it moves on through the Great Lakes, over Niagara Falls and down the St. Lawrence to the Atlantic.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Oulu; river miles along the main stem, rounded.
Oulu has a warm-summer humid continental climate. Summer afternoons average 78° in July; winter nights fall to about 2° in January. About 33 inches of rain fall in a normal year.
On November 14 Oulu normally reaches 38° and falls to 24°. The record high is 69°, in 1999; the record low −5°, in 1943. The most rain on this date, 1.49 in, fell in 2021.
Normals 1991–2020 and records since 1928 at Brule Ranger Station, 7 miles south-southwest. NOAA, through RCC-ACIS.
