Monthly summary 



July, 1929 



Normal ■ 



Extremes 



4.33 



11 



3435 



4.6 

 24 



Barometer 



(Readings reduced to sea level) 1 



Maximum 30.41, 21st i 30.28 



Minimum 29.57, 2nd | 29.60 



Mean semi-daily 30.003 I 29.972 



Range 84 j 0.68 



Air Temperature 



Highest 94.0, 28th I 93.9 



Lowest 45.0, 4th | 45.5 



Mean 70.1 70.6 



Monthly range 49.0 48.4 



Highest mean daily 81.0, 28th 



Lowest mean daily 57.5, 3rd 



Mean maximum 83.7 



Mean minimum 56.6 



Greatest daily range 37.0, 21st 



Least daily I'ange 15.0, 8th 



Hrecipitiitioii 



Precipitation. In inches 70 



Maximum precipitation in 24 hrs. .34, ' 



14th 

 Number of days on which .01 or 



more inches of rain fell 6 



wind (miles) 1 



Total movement 3768 I 



Greatest daily movement .... 224, 2nd 



Least daily movement 54, 6th, 21st 



Mean hourJy velocity 5 



Maximum velocity for 5 min 33, 2nd 



(ciiriected to c<inf(irm 103 cup anemometer) 

 Wind (direction) 



Prevailing direction s 



North, days 1 



Northeast, days 1 



East, days 



Southeast, days 12 



South, days 4 



Southwest, days 4 



West, days 4 



Northwest, days 5 



Wejither 



Mean relative humidity, per cent 66.0 75.6 



Mean cloudiness, per cent 40 50.I 



Number of clear days 3 9 



Number of fair days . 23 14 



Number of cloudy days 5 



Number of hours bright sunshine 219.2 266 

 Percent of possible hours of bright 



sunshine 51.0 58 



Thunder and lightning 



30.50, 1892 

 29.39, 1909 



0.97, 1892; 0.51, 1895, 1899 



104, 1911 

 34, 1889 



14.51, 1897; 1.55, 1894 



20, 1915; 4, 1924 

 5097, 1909; 1109, 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 cf)lumn in the above summary gives oljservations made during the 

 nvinth. Hie second and third cuhimns give tlie averages and extremes observed from 1S89 

 to 192S tor the same miaitli i/f the year. 



