THE DESERT CLIMATE 



9 



At many stations in the North American deserts 

 the distribution of the rainfall resembles that which 

 has just been described in the Indian desert (Fig. 3). 

 The heaviest fall occurs in the summer, and a 

 definite winter rain occurs in many places, so that 



XII I 11 III IV V VI VII VIII tX X XI XII 

 ain.T"-' — ' — ■ — ■ — ' — ' — ■ — ' — ' — ■ — ■ — nbm. 



-50 mm. 



25 mm. 



oo ceo Tucson, Arizona 

 - - S^George. Utah 



Fort Mohave, Arizona. 

 Calexio, California. 



Fig. 3. 



-Average Monthly Rainfall of Four Places in the Deserts 

 OF THE Southern States of the U.S.A. 



The distribution of rainfall shown in this graph is not characteristic of stations in every part 



of these deserts. 



there are two short dry seasons, in early summer 

 and in autumn, in the North American and in the 

 Indian deserts. At a large number of stations in 

 the arid parts of North America only one rainy season 

 is recorded, either in midsummer or in midwinter. 

 So far, then, as moisture is concerned the conditions 



