Climatic Conditions in Oregon. 85 



Sparta the elevation is 4,150 feet; the annual temperature, 45.3 degrees, 

 and the annual rainfall is 22.74 inches. 



BENTON COUNTY. 



Benton County is in the heart of the Willamette Valley and extends 

 from the Willamette River into the Coast Range Mountains. The 

 elevation at Corvallis, the county seat, is 266 feet. The annual temper- 

 ature is 51.7 degrees; that of January, 39.1; April, 30.1; July, 65.3; 

 October, 52.6. The annual rainfall is 43.32 inches. At Monroe the 

 elevation is 350 feet. The annual temperature is 52.2 degrees; that 

 of January, 39.8; April, 50.5; July, 65.3; October, 53.4. The average 

 period between killing frosts is 197 days, or about the same as at 

 Richmond, Virginia. The annual rainfall is 52.2 inches. 



CLATSOP COUNTY. 



Clatsop County is in the northwest corner of the State. Much of 

 the county is hilly or mountainous, but there is also a considerable 

 amount of low-lying land. Astoria, the county seat, is on the Columbia 

 River, 10 miles from the ocean. The elevation of the Station is 16 feet. The 

 annual temperature is 51.8 degrees; that of January, 39.9; April, 49.7; 

 July, 61.6; October, 53.2. The average season between killing frosts is 

 271 days, or about the same as at Mobile, Alabama. The annual 

 rainfall is 73.49 inches. 



CLACKAMAS COUNTY. 



Clackamas County is in the Willamette Valley but extends from the 

 Willamette River to the summit of the Cascade ränge of mountains. 

 The Observation stations represent fairly only the lower-lying sections 

 of the arable lands of the county. At Miramonte farm, near Aurora, 

 the elevation is 195 feet. The annual temperature is 51.5 degrees; that 

 for January, 38.5; April, 50.6; July, 65.2; October, 52.6. The annual 

 rainfall is 43.52 inches. At Stafford, in the western part of the county, 

 the elevation is 400 feet. The temperature is about the same as at 

 Miramonte farm, but the annual rainfall is 51.66 inches. Cazadero 

 is in a narrow Valley in the foot-hill portion of the county, and is at 

 an elevation of 503 feet, but most of the adjacent arable lands are at 

 elevations of from 900 to 1,500 feet. The annual temperature for 

 1911 was 51.5 degrees. At Pompeii (Rowe P. O.) in the heart of the 

 Cascade Mountains, the elevation is 3,879 feet; the annual temperature 

 is 43.7 degrees. The period between killing frosts is about 84 days. 

 The annual rainfall is 85.46 inches. 



COLUMBIA COUNTY. 



Columbia County is in the northwestern portion of the State and 

 contains some low-lying land along the Columbia River, but the general 

 elevation of the county is above 1,000 feet. At Doraville, near Rainier, 

 the annual temperature is 49.6 degrees; that of January, 36.2; April, 

 44.5; July, 62.5; October, 53.4. The annual rainfall is 51.74 inches. 



COOS COUNTY. 



Coos County is in the southwestern portion of the State fronting on 

 the ocean. The Observation stations represent the low-lying Valleys 

 which are now utilized. Much land at higher levels will in time come 



