TEMPERATURE AND DRY-FARMING 43 
not far from 45° F. This places most of the dry- 
farm territory in the class of cold regions, though a 
small area on the extreme east border may be classed 
as temperate, and parts of California and Arizona 
as warm. The range in temperature from the high- 
ibid 
Fic. 15. Winter in the Great Basin. A good snowfall in sections where 
the summer precipitation is light generally insures a good crop. 
est in summer to the lowest in winter is considerable, 
but not widely different from other similar parts of 
the United States. The range is greatest in the 
interior mountainous districts, and lowest along 
the seacoast. The daily range of the highest and 
lowest temperatures for any one day is generally 
higher over dry-farm sections than over humid 
