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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 warmest month is August, with an average high temperature of 82.3 °F (27.9 °C). Because of its inland location 62 miles (100 km) from the coast, as well as the protective nature of the Oregon Coast Range to its west, Portland summers are less susceptible to the moderating influence of the nearby Pacific Ocean.
The 2021 Western North America heat wave was an extreme heat wave that affected much of Western North America from late June through mid-July 2021. The heat wave affected Northern California, Idaho, Western Nevada, Oregon, and Washington in the United States, as well as British Columbia, and in its latter phase, Alberta, Manitoba, the Northwest Territories, Saskatchewan, and Yukon, all in Canada.
A similar scenario is expected in Portland, where temperatures will flirt with the 100-degree mark, about 5-15 degrees above the historical average, over a multiday stretch.
With a high of 100 F Tuesday afternoon in Portland, Oregon, the city endured the worst of the heat, breaking a daily record high of 98 was set in 1987, with Tuesday being more than 15 degrees ...
The National Weather Service posted an ice storm warning in parts of Oregon, including Portland, until Wednesday when temperatures were expected to rise to 43 degrees (6.11 degrees C).
Later on in the month, another heat wave in Portland, Oregon causes 14 additional deaths. Portland saw 7 consecutive days at or above 95 °F (35 °C), while Seattle saw six days at or above 90 °F (32 °C), both breaking records for duration, by July 31. August. Intense heat continued into August.
"For the month of June, the historical average rainfall in Seattle is only 1.45 inches. Through Monday, Seattle may receive its entire monthly average of rainfall in a 24- to 48-hour timespan as a ...