MONTHLY SUMMARY 



August 1942 



Barometer, in inches 



(Readings reduced to sea level) 



Maximum „ 30.45, 26th 



Minimum 29.71, 2nd, 3rd 



Mean semi-daily „ 30.048 



Range 0.74 



Air Temperature, in degrees F. 



Highest 91, 22nd 



Lowest 4 1 , 26th 



Mean 68.9 



Range 50 



Highest mean daily _ 80.5. 22nd 



Lowest mean daily 56.5, 25th 



Mean maximum 80.2 



Mean minimum 57.6 



Greatest daily range 37, 31st 



Least daily range 6, 9th 



Precipitation, in inches 



Precipitation 2.93 



Maximum precipitation in 24 hrs 2.05, 



13th, 14th 

 Number of days with .01 or more 6 



Wind, in miles 



T otal movement 2790 



Greatest daily movement „ 189, 3rd 



Least daily movement 22, 7th 



Mean velocity 3.8 



Maximum velocity 22, 3rd, 4th 



Wind, direction 



Prevailing direction WSW 



North, days 1 



Northeast, days 1 



East, days _ 1 



Southeast, days 6 



South, days 4 



Southwest, days 4 



West, days 7 



Northwest, days 7 



Weather 



Mean relative humidity, percent 73.9 



Mean cloudiness, percent 52 



Number of clear days 16 



Number of fair days 12 



Number of cloudy days 3 



Number hours bright sunshine 288 



Percent of possible hours of bright 



sunshine 67.1 



Thunder and lightning 14th, lf)th, 17th, 22nd 



First frost 



Normal 



30.32 



29.61 



30.00 



0.71 



91.6 

 43.4 

 68.6 

 48.1 



4.08 



11 



3127 



4.2 

 22.7 



SW 



70.2 



49.7 



9 



13 



9 



237 



55.2 



Sept. 21 



Extremes 



30.50, 1934 

 28.87, 1930 



100, 1918 



37, 1894, 1908 



34, 1940 



8.40, 1928; .31, 1894 



16, 1892, 1933; 4, 1899 



4,271, 1910; 1,920, 1894 



40, 1941 



67, 1901 ; 27, 1923 



23, 1941 ; 0, 1915, 1929 



25, 1912; 3, 1939 



18, 1901, '28:2. 1910. '23 



332, 1941 ; 152, 1915. 1929 



Aug. 22, '94, '95 ; Oct. 13, '09 



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

 the month. The second column gives the averages based on observations made 

 from 1889 to 1938, except that humidity records are based on observations made 

 from 1929 to 1938. The third column gives extremes observed from 1889 to 1941. 



