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Köppen climate types of Oregon, using 1991-2020 climate normals. Trewartha climate types of Oregon. According to the Köppen climate classification, most of Western Oregon has a warm-summer Mediterranean climate (or Csb type), which features warm, dry summers, and wet winters with frequent overcast and cloudy skies.
Roseburg is the most populous city in and the county seat of Douglas County, Oregon. [5] It is located in the Umpqua River Valley in southern Oregon . Founded in 1851, the population was 23,683 at the 2020 census , making it the principal city of the Roseburg, Oregon Micropolitan Statistical Area.
The Willamette Valley contains most of Oregon's population; it extends from the Portland metro area in the north to Eugene in the south. The Willamette Valley (/ wɪˈlæmɪt / ⓘ wil-AM-it) is a 150-mile (240 km) long valley in Oregon, in the Pacific Northwest region of the United States. The Willamette River flows the entire length of the ...
The climate in the Calapooya Mountains follows a pattern of wet winters and dry summers. Precipitation generally increases with elevation, ranging from an average of 40 to 50 inches (1,000 to 1,300 mm) per year in the valleys to 70 to 80 inches (1,800 to 2,000 mm) on the mountain peaks.
Douglas County, Oregon. Douglas County is one of the 36 counties in the U.S. state of Oregon. As of the 2020 census, the population was 111,201. [1] The county seat is Roseburg. [2] The county is named after Stephen A. Douglas, an American politician who supported Oregon statehood.
The Oregon Coast Range, often called simply the Coast Range and sometimes the Pacific Coast Range, is a mountain range, in the Pacific Coast Ranges physiographic region, in the U.S. state of Oregon along the Pacific Ocean. This north-south running range extends over 200 miles (320 km) from the Columbia River in the north on the border of Oregon ...
High Desert (Oregon) The Oregon High Desert is a region of the U.S. state of Oregon located east of the Cascade Range and south of the Blue Mountains, in the central and eastern parts of the state. Divided into a southern region and a northern region, the desert covers most of five Oregon counties and averages 4,000 feet (1,200 m) above sea ...
Southern Oregon is a region of the U.S. state of Oregon south of Lane County and generally west of the Cascade Range, excluding the southern Oregon Coast. Counties include Douglas, Jackson, Klamath, and Josephine. It includes the Southern Oregon American Viticultural Area, which consists of the Umpqua and Rogue River drainages. As of 2015, the ...