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 



Men -jut. MAT 



C*LgAeY,:mMOWTTy ■ 5S' 



PTCHIPt yViMS. 



Fig. 13. — ^Average Temperature by Months at Bepresentative 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 



