WHOLE VOL. 



NORTH AMERICA 



329 



MONTERREY, MEXICO 



Lat. 25°40' N. Long. 100°18' W. H=:528 m. 



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



GRAV. AT 45° LAT. 



Means of J (7" + 14'' +21"), 90th meridian W. 



700 mm. + 



Mean 17.5 16.6 15.2 14.6 14.2 14.5 14.9 15.4 15.6 17.1 18.2 17.5 *16.9 



TEMPERATURE IN DEGREES C. 



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



Date Jan. Feb. Mar. Apr. May June July Aug. Sept. Oct. Nov. Dec. Mean 



Mean 15.4 16.6 20.2 22.5 25.1 27.3 27.2 27.1 24.8 22.4 17,7 15.1 *21.8 



TOTAL PRECIPITATION IN MILLIMETERS 



Mean of 12 monthly means. 



t Sum of 12 monthly moans. 



