WHOLE VOL. 



NORTH AMERICA 



325 



LEON, MEXICO 



Lat. 21'7' N. Long. 101°41' W. Hb= 1,809 m. 



PRESSURE AT STATION LEVEL: COR. TO 0° C. (32° F.) AND TO 



GRAV. AT 45° LAT. 



Means of J(7" + 14''+2r-), 90th meridian W. 



600 mm. + 



Mean 16.4 16.1 15.4 15.2 15.1 15.4 16.4 16.3 15.8 16.6 17.0 16.8 16.0 



TEMPERATURE IN DEGREES C. 



Means of J (7" + 14" + 21") 



Mean 14.7 16.2 18.5 20.9 22.6 22.0 20.2 20.1 19.6 18.8 16.6 15.2 



18.8 



TOTAL PRECIPITATION IN MILLIMETERS 



