THE CLIMATE OF WESTERN CANADA 27 



17. Spring and Fall Frosts in Western Canada. The 

 number of days between the last spring frost and the 

 first fall frost and the average date of each is perhaps 

 the most useful temperature information the grain 



Fig. 13. Average Temperature by Months at Representative Points. 



grower and truck farmer could obtain. The meteoro- 

 logical records show that southeastern Alberta, south- 

 western Saskatchewan (and the Red River valley of 

 Manitoba) have a longer frost-free period than any 



