MONTHLY SUMMARY 



August. 1930 



Normal 



Extremes 



Baromeier 



(Reading's reduced to sea level) 



Maximum 30.36, 31st 



Minimum 28.87, 24th 



Mean semi-daily 29.950 



Range 1.49 



Air Temperature 



Highest 93,3rd 



Lowest 43,13th 



Mean 67.8 



Monthly range 50 



Highest mean daily 80, 3rd 



Lowest mean daily 57, 12th 



Mean maximum 80.2 



Mean minimum 55.4 



Greatest daily range .. 33,11,13,28,31st 

 Least daily range 7, 15th 



Precipitation 



Precipitation. In inches 1.82 



Snow, in inches 



Maximum precipitation in 24 hrs. 



.95, 14th, 15th 

 Number of days on which .01 or 



more inches of rain fell 10 



Wind (miles) 



Total movement 3,297 



Greatest daily movement 264, 23rd 



Least daily movement 42, 28th 



Mean hourly velocity 4.4 



Maximum velocity for 5 min 32, 23rd 



(corrected to coiifonu to 3 cup anemometer) 

 Wind (direction) 



Prevailing direction south 



North, days .... 1 



Northeast, days 3 



East, days 



Southeast, days 9 



South, days 5 



Southwest, days 4 



West, days 



Northwest, days 9 



Weather 



Mean relative humidity, per cent. . 71.6 



Mean cloudiness, per cent 50 



Number of clear days 16 



Number of fair days 10 



Number of cloudy days 5 



Number of hours bright sunshine 281.3 

 Percent of possible hours of bright 



sunshine 65 



Thunder and lightning 8th, 9th, 16th, 



18th, 29th. 



30.32 



29.63 



29.972 



0.69 



91.3 

 42.9 



68.4 

 48.4 



4.24 



10 

 3,099 



4.2 

 21 



78.4 

 49.4 

 9 

 13 

 9 

 236 



55 



30.48, 1918 

 29.18, 1890 



1.10, 1890; 0.44, 1894 



100, 1918 

 37, 1894, 1908 



8.28, 1915; 0.31, 1894 



16, 1892; 4, 1899 

 4,271, 1910; 1,920, 1894 



35, 1915 



87.3, 1927; 69.9, 1894 



67, 1901; 27, 1923 



17, 1921; 0, 1915 



25, 1912; 5, 1893 



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



317, 1921 ; 152, 1915, 1929 



NoTR— The first column in the above summary gives observations made during the 

 mouth. The second and third columns give the averages and extremes observed from 1889 

 to 1929. 



