Monthly Summary 



July. 1937 



Normal 



Extremes 



Barometer 



(Readings reduced tn sea levelj 



Maximum 30.18,29th 



Minimum 29.57, 16th 



Mean semi-daily 29.963 



Range 0.61 



Air Xemperature 



Highest 96, 8th 



Lowest 50, 2nd 



Mean 71.6 



Monthly range 46 



Highest mean daily 81.5, iOth 



Lowest mean daily 61.5, 2nd 



Mean maximum 83.3 



Mean minimum 59.9 



Greatest daily range 34, 8th 



Least daily range 5, 12th 



Precipifsitioii 



Precipitation. In inches 2.88 



Snow, in inches 



Maximum precipitation in 24 hrs. 



1 01 1st 

 Number of days on which .01 or more 



inches of precipitation fell. ... 5 

 Wind (miles) 



Total movement 2,725 



Greatest daily movement 206, 26th 



Least daily movement 41, 22nd 



Mean hourly velocity 4.0 



Maximum velocity, 5 min., .... 25, 17th 

 Wiiiil (direction) 



Prevailing direction ssw 



North, days .... 



Northeast, days 2 



East, days 



Southeast, days 9 



South, days 6 



Southwest, days 2 



West, days 2 



Northwest, days 10 



Weather 



Mean relative humidity, per cent. . 68.3 



Mean cloudiness, per cent 83 



Number of clear days 19 



Number of fair days 10 



Number of cloudy days 2 



Number of hours bright sunshine . . 319 

 Percent of possible hours of bright 



sunshine 69 



Thunder and lightning 1st, 11th, 24th, 



26th 



30.28 



29.60 



29.972 



.68 



93.9 



45.5 

 70.6 

 48.4 



4.33 



11 



3,435 



4.6 

 24 



sw 



68.0 



50.1 



9 



14 



8 



267.0 



57.8 



30.59, 1892 

 29.27, 1932 



0.97, 1892; 0.51, 1895, 1859 



104.0, 1911 

 40.0, 1890, 1898 



14.51, 1897; 0.70, 1929 



■ 20, 1915; 4, 1924 

 5,097, 1909; 1,109, 1894 



44, 1936 



69, 1914; 31, 1924 

 22, 1923; 0, 1915 

 24, '09, '21; 5, '89, '23, '28, '36 

 18, 1889; 0,1910 

 371, 1910; 182, 1889 



NOTK— Tlie first oolnoin 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 made from 1929 to 1986 

 The third colmiiii gives extremes observed from 1889 to 193(i 



