MONTHLY SUMMARY 



August, 1946 



Barometer, in inches 



(Readings reduced to sea level) 



Maximum 30.35, 15th 



Minimum _ ._....29.66, 10th 



Mean semi-daily _— — 29.992 



Range __- _ 0.69 



Air Temperature, in degrees F. 



Highest 89, 9th 



Lowest 45, 31st 



M ean 66. 1 



Range 44 



Highest mean daily 73.5, 9th, 17th 



Lowest mean daily 58, 13th, 30th 



Mean maximum 76.7 



Mean minimum .__ 55.5 



Greatest daily range _ 31, 9th, 28th 



Least daily range 8, 7th 



Precipitation, in inches 



Precipitation __ 4.00 



Snow . — 



Maximum precip. in 24 hrs. 0.88, 23rd 



Number of days with .01 or more IS 



Wind, in miles 



Total movement _— ___ 2863 



Greatest daily movement 199, 2nd 



Least daily movement 34, 6th 



Mean hourly velocity 3.8 



Maximum velocity 18, 2nd 



Wind, direction 



Prevailing direction .— _ ..W 



North, days 4 



Northeast, days — 



East, days 



Southeast, days 3 



South , days 6 



Southwest, days . 3 



West, days 6 



Northwest, days 9 



Weather 



Mean relative humidity, percent 79.2 



Alean cloudiness, percent 67 



Number of clear days 11 



Number of fair days 10 



Number of cloudy days 10 



Number of hours bright sunshine 239 



Percent of possible hours of bright 



sunshine 55.7 



Thunder and lightning 23rd. 26th, 27th, 29th 

 First frost — 



Normal 



30.32 



29.61 



30.00 



0.71 



91.6 

 43.4 

 68.6 

 48.1 



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 



34, 1940 



62.4. 1903 



8.40, 1928; .31, 1894 



16, 1892, 1933; 4, 1899 



4,271, 1910; 1,920. 1894 



40, 1941 



(yl, 1901 ; 27, 1923 



23, 1941 ; 0, 1915, 1929 



25, 1912; 3, 1939 



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



332, 1941 ; 152, 1915, 1929 



.\ug. 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 19,18, except that humidity records are based on observations made 

 from 1929 to 1938. The third column gives extremes observed from 1889 to 1945 



