MONTHLY SUMMARY 



JULY, 194S 



Normal 



Extremes 



Barometer, in inches 

 (Readings reduced to sea level) 



:\Iaximum 30.10, 9th 



.Minimum 29.48, 6th 



-Mean semi-daily 29.815 



Range 0.62 



Air Temperature, in degrees F. 



Highest 94. I2th 



Lowest 52. 3rd. Sth, 9th. 25th 



Mean 72.3 



Range 42 



Highest mean daily Sl.O, 12th 



Lowest mean daily 65.5. 7th 



Mean maximum 84.3 



.Mean minimum 60.2 



Greatest daily range 34. Sth. 9th 



Least daily range 12. 13th 



Precipitation, in inches 



Precipitation 2.95 



Maximum precip. in 24 hrs 1.02, 13th 



Number of days with .01 or more 7 



Wind in miles 



Total movement 2524 j 



Greatest daily movement 184. 31st! 



Least daily movement 27. 3rdi 



Mean hourly velocity 3.4j 



Maximum velocity 32, Sthl 



Wind, direction 



Prevailing direction SW 



North, days 6 



Northeast, days 



East, days 4 



Southeast, days 4 



South, days 7 



Southwest, days 2 



West, days 2 



Northwest, days 61 



Weather 



Mean relative humidity, percent 62.6 



Mean cloudiness, percent 38 



Number of clear days ISj 



Number of fair days 12j 



Number of cloudy days 4| 



Number of hours bright sunshine 282| 



Percent of possible hours of 



bright sunshine .6l| 



Thunder and lightning 



5th, 6th. 13th. 23rd. 27th 



30.27 



29.59 



29.96 



0.68 



93.9 

 46.4 



70.8 

 47.7 



4.10 

 11 



3422 



4.6 



28.7 



SW 



68.4 

 50.9 

 10 

 14 

 7 

 268 



58 



30.50, 1892 

 29.27, 1932 



0.97. 1892; 0.47, 1938 



104, 1911 



40, 1890, 1898 



74.7, 1921; 66.3, 1891 



14.51. 1897; 0.70. 1929 



20. 1915; 4, 1924 



5097. 1909; 1109, 1894 



44, 1936 



70, 1943; 3l, 1924 



22. 1923; 0, 1915 



24. "09, '21; 4, 1946 



18. 1889; 0, 1910 



371. 1910; 180, 1931 



Note — The first column in the above summary gives observations made 

 during the month. The second column gives the averages based on observa- 

 tions made from 1889 to 1938, except that humidity records are based on 

 observations made from 1929 to 1938. The third column gives extremes 

 observed from 1889 to 1947. 



