324 



SMITHSONIAN MISCELLANEOUS COLLECTIONS 



VOL. 105 



CHIHUAHUA, MEXICO 



Lat. 28°38' N. Long. 106°5' W. 

 TOTAL PRECIPITATION IN MILLIMETERS. H = 1,423 m. 



Date Jan. Feb. Mar. Apr. May June July Augr. Sept. Oct. Nov. Dec. Year 



1931 

 1932 

 1933 

 1934 

 1935 



1936 

 1937 

 1938 

 1939 

 1940 



0.5 



T 



27.8 



22.7 



25.0 



0.0 

 2.0 

 4.5 

 T 

 1.8 



Mean 15.2 16.6 



7.5 



T 



4.0 



7.8 



11.8 



6.2 



T 



0.0 



10.4 



0.0 



1.4 



6.2 



0.5 



T 



24.3 



11.1 



4.0 



111.4 



43.7 



46.0 



141.2 

 42.8 



174.4 

 97.7 

 39.0 



67.6 

 51.0 

 43.4 

 99.9 

 76.4 



2.4 7.7 43.2 99.0 67.6 



* Sum of 12 monthly means. 



111.7 



137.6 



195.9 



35.0 



6.7 



97.4 



6.5 



10.2 



5.3 



5.2 



17.4 



49.2 

 17.0 

 0.0 

 32.8 

 18.6 



T 

 30.4 



T 



28.8 



2.0 



301.2 

 677.6 

 373.6 

 270.4 



8.9 23.6 12.2 *399.9 



