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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. Eastern Oregon falls into the cold semi-arid climate (or BSk type), which features drier weather.
The climate of the Willamette Valley is a mix of Mediterranean (Köppen Csb) and oceanic (Köppen Cfb) influences. The Köppen climate classification system considers it Mediterranean, but compared to a true Mediterranean climate it is cooler and moister, with a longer rainy season.
To the west where the range over-shadows the Oregon Coast, the range causes more precipitation to fall on that side of the mountains, contributing to the numerous rivers that flow to the Pacific Ocean. Marys Peak in the Central Coast Range is the highest peak at 4,097 feet (1,248 m).
Average precipitation. The characteristics of United States rainfall climatology differ significantly across the United States and those under United States sovereignty. Summer and early fall bring brief, but frequent thundershowers and tropical cyclones which create a wet summer and drier winter in the eastern Gulf and lower East Coast.
Salem, Oregon. Salem (/ ˈseɪləm / SAY-ləm) is the capital city of the U.S. state of Oregon, and the county seat of Marion County. It is located in the center of the Willamette Valley alongside the Willamette River, which runs north through the city. The river forms the boundary between Marion and Polk counties, and the city neighborhood of ...
The Tillamook State Forest is a 364,000-acre (1,470 km 2) publicly owned forest in the U.S. state of Oregon. Managed by the Oregon Department of Forestry, it is located 40 miles (64 km) west of Portland in the Northern Oregon Coast Range, and spans Washington, Tillamook, Yamhill, and Clatsop counties. The forest receives large amounts of precipitation and is dominated by Douglas-fir trees ...
The climate of the United States varies due to changes in latitude, and a range of geographic features, including mountains and deserts. Generally, on the mainland, the climate of the U.S. becomes warmer the farther south one travels, and drier the farther west, until one reaches the West Coast.
Climate change in Oregon Köppen climate types in Oregon, showing that most of the state is warm-summer mediterranean, with significant pockets of cold semi-arid and warm-summer Mediterranean continental. Snowpack decline over time in Oregon and surrounding states.
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