Today in Salem, United States
Partly cloudy. High 42F. Winds NNE at 5 to 10 mph.
Partly cloudy. Low 24F. Winds SSE at 5 to 10 mph.
This weather data was last updated 2018-02-19 09:02:15.
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Oregon experiences an oceanic climate. Oregon climate varies from the western and eastern region of the state. Western Oregon mostly experiences a variety of oceanic climate which is also called west coast marine climate. Eastern Oregon experiences a semi-arid climate. Oregon weather is mostly influenced by semi-permanent high pressure and low pressure air masses which come from the North Pacific Ocean. Precipitation in Oregon varies between the western and eastern regions of the state. The east of Oregon particularly Alvord Desert receives very little rainfall, 8 inches (200 mm) per year while some areas in the west receive as much as 200 inches (5100 mm) per year.
Oregon has a wide range of temperatures which vary from as low as -54 degrees Fahrenheit (-48 degrees centigrade) to as high as 119 degrees Fahrenheit (48 degrees centigrade). Temperatures in the Willamette Valley are mild as compared to temperatures in the desert which go above 90 degrees Fahrenheit (32 degrees centigrade). The warmest area in Oregon is Jackson County which is located southwest of the state.
Eastern And Western Oregon
Eastern Oregon experiences a dry continental climate which has very great seasonal variations in temperatures. Eastern Oregon receives a lot of snow during winter. Some areas of eastern Oregon receive less than 10 inches of rain (250 mm) which classifies them as deserts under Koppen climatic classification. The driest region of the state is in the southwest area neat Redmond. The desert climates of the eastern region are mostly influenced by a rain shadow caused by the Cascade Range. Western Oregon generally experiences a rain forest climate unlike eastern Oregon which receives very little rainfall.
Climatic Information of Alvord Desert
Alvord desert is a desert located in southeastern Oregon. According to Koppen climate classification this desert is classified as a cold semi-arid desert. The desert receives low rainfall with some areas receiving as little as 5 inches of rain per year. The deserts climate is due to a double rain shadow effect which is caused by the Cascade Mountain range and the adjacent Steens Mountain.
Winters in Alvord basin are moderated by air which flows from the south and stops temperatures from dropping steeply. Areas in the Oregon high desert often experience temperatures which are below freezing during winter while Alvord rarely experiences such temperatures. Clear nights cause desert temperatures to fall far into the 20s on a night to night basis but they do not usually drop any further unless Arctic air masses come from Canada. The desert basin receives most of its rainfall during the winter season from storms that come from the Pacific Ocean with the strong wet jet stream being aimed at the Pacific Northwest.
Strong storms often bring in moisture to the southeastern region of Oregon and are mostly associated with tropical storms coming from Hawaii. Due to the warm nature of these air masses snow is rarely seen on the desert floor. Snow does occur on rare occasions when the arctic air mass is predominant and a flow of moisture is coming from the west.
Spring months in Alvord desert are characterized by precipitation that is accompanied by thunderstorms. The thunderstorms bring in most of the rain received in April, May and June. Clear nights continue to lower overnight temperatures which will usually drop below to the 30s and low 40s.
Summer in Alvord desert is very hot. During this time high pressure sets in which causes very little summertime rain. Rainfall throughout the summer months can average about 1 inch. In July temperatures can go up to the 90s and go above the 100 a few times every year.
Fall is a favorable time in the Alvord basin because temperatures range between 60 and 70 degrees Fahrenheit with minimum temperatures rarely going below 40 degrees Fahrenheit. Fall is a dry season and there will be no thunderstorms and the winter jet stream will not yet have taken place.
We at Oregon Weather.Net believe that the best time to visit Oregon is when the temperatures are not too hot or too cold and that is during the fall season. Visiting this place in summer may not be great as you may have disturbances from the thunderstorms which are common during this season. Besides the thunderstorms Oregon generally has a great climate which is great for touring the place throughout the year.