Monthly Summary 



July, 1933 



Normal 



Extremes 



liarometer 



(Readings reduced to sea level) 



Maximum 30.31, 3rd, 4th 



Minimum 29.57, 1st 



Mean semi-daily 29.993 



Range 0.74 



Air Temperature 



Highest 97, 30th 



Lowest 47, 13th 



Mean 72.3 



Monthly range 50 



Highest mean daily 87.5, 30th 



Lowest mean daily 61.0, 3rd 



Mean maximum 84.8 



Mean minimum 59.8 



Greatest daily range 33, 6th,13th,18, 28th 

 Least daily range 13, 5th, 16th 



Precipitation 



Precipitation. In inches 2.25 



Snow, in inches 



Maximum precipitation in 24 hrs. .76, 



8th, 9th 

 Number of days on which .01 or more 

 inches of rain fell 8 



■Wind (miles) 



Total movement 3,362 



Greatest daily movement .... 199, 1st 



Least daily movement 52, 27th 



Mean hourly velocity 4.5 



Maximum velocity for 5 min 28, 8th 



(corrected to conform to 3 cup anemometer) 

 Wind (direction) 



Prevailing direction sw 



North, days 2 



Northeast, days 3 



East, days 2 



Southeast, days 7 



South, days 2 



Southwest, days 6 



West, days 5 



Northwest, days 4 



Weather 



Mean relative humidity, per cent . . 69.0 



Mean cloudiness, per cent 58.2 



Number of clear days 13 



Number of fair days 12 



Number of cloudy days 6 



Number of hours bright sunshine 274.5 

 Percent of possible hours of bright 



sunshine 59.4 



Thunder and Lightning, 8th, 23rd, 24th 



31st 

 Frosts, 



30.28 



29.60 



29.972 



.68 



93.9 

 45.5 

 70.6 

 48.4 



4.33 



11 



3,435 



4.6 

 24 



75.6 

 50.1 



9 

 14 



8 

 267.0 



57.8 



30.50, 1892 

 29.27, 1932 



0.97, 1892; 0.51, 1895, 1899 



104.0, 1911 

 40.0, 1890, 1898 



14.51, 1897; 0.70, 1929 



20, 1915 ; 4, 1924 



5,097, 1909; 1,109, 1894 



39, 1908, 1915 



88.8, 1927; 64.8, 1893 

 69, 1914; 31, 1924 

 22, 1923; 0, 1915 

 24, '09, '21; 5, '89, '23, '28 

 18, 1889; 0, 1910 

 371, 1910; 182, 1889 



Note— The first column in tlie aiiove summary gives observations made during the 

 month. The second column tri ves the averages based on observations made from 18»y to 

 1928. The third column gives extremes observed from 1889 to 1932. 



