MONTHLY SUMMARY 



August 19.H5 



Normal 



Extremes 



Barometer 



(Readings reduced to sea level) 



Maximum 30.31, 18th 



Minimum 29.57, 1st 



Mean semi-daily 30.012 



Range 0.74 



Air T«» 111 pera< lire 



Highest 92, 17th, 18th 



Lowest 45, 25th 



Mean 69.4 



Monthly range 47 



Highest mean dail y 78, 13th 



Lowest mean daily 54.5, 30th 



Mean maximum 80.6 



Mean minimum 58.2 



Greatest daily range 34, 26th 



Least daily range 4, 11th 



Precii>i*s«<ioii 



Precipitation. In inches 82 



Snow, in inches 



Maximum precipitation in 24 hrs'. .33, 



11th 

 Number of days on which .01 or more 



inches of rain fell 8 



Willi! (miles) 



Total movement 3251 



Greatest daily movement 253, 24th 



Least daily movement 46, 15th 



Mean hourly velocity 4.4 



Maximum velocity for 5 min., 25,25th 



Wind (direction) 



Prevailing direction wsw 



North, days 2 



Northeast, days 2 



East, days ■ ■ 



Southeast, days 9 



South, days 4 



Southwest, days 2 



West, days 2 



Northwest, days 10 



Weather 



Mean relative humidity, per cent . . . 69.7 



Mean cloudiness, per cent 50.4 



Number of clear days 15 



Number of fair days 10 



Number of cloudy days 6 



Number of hours bright sunshine . . 254 

 Percent of possible hours of bright 



sunshine 59.2 



Thunder and Lightning 11th, 13th, 



30.32 



29.63 



30.00 



.69 



91.3 

 42.9 

 68.4 



48.4 



4.24 



10 

 3,099 



4.2 

 21 



69.9 



49.4 



9 



13 



9 



237.0 



55.2 



30.48, 1918 

 28.87, 1930 



1.49, 1930; 0.44, 1894 



100.0, 1918 

 37.0, 1894, 1908 



8.40, 1928 ; 0.31, 1894 



16,1892, 1933; 4, 1889 

 4,271, 1910; 1,920, 1894 



35, 1915 



87.3, 1927; 65, 1929 



67, 1901; 27, 1923 



17, 1921; 0,1915 



25, 1912; 5, 1893, 19 33 



18, '01 '28; 2, '10 '23 



317,1921; 152, 1915, 1929 



Note— The first colunjn in the above summary gives observations made during the 

 month. The second column gives the averages based on observations made from 18x9 to 

 1928, except that humidity records are based on observations from 1'.('29 to 1'.IS4 The 

 third column gives extremes observed from 1889 to t934. 



