MONTHLY SUMMARY 



JUNE, 1948 



Barometer, in inches 

 (Readings reduced to sea level) 



Maximum 29.97, 23rd 



Minimum 29.30, 8th 



Mean semi-daily 29.803 



Range 0.67 



Air Temperature, in degrees F. 



Highest 93, 29th 



Lowest 41, 6th 



Mean 64.7 



Range 52 



Highest mean daily 80.5, 30th 



Lowest mean daily 53.5, 7th 



Mean maximum 75.3 



Mean minimum 54.1 



Greatest daily range 35, 2nd 



Least daily range 5, 23rd 



Degree-days of heating load for month. .79 

 Degree-days cumulative for season....6999 



Precipitation, in inches 



Precipitation 5.07 



Maxium precip. in 24 hrs 1.27, 5th 



Number of days with .01 or more 15 



Wind in miles 



Total movement 2342 



Greatest daily movement 129, 5th 



Least daily movement 42, 22nd 



Mean hourly velocity 3.3 



Maximum velocity 32, 24th 



Wind, direction 



Prevailing direction SW 



North, days 1 



Northeast, days 5 



East, days 



Southeast, days 6 



South, days 6 



Southwest, days 2 



West, days 4 



Northwest, days 6, 



Weather 



Mean relative humidity, percent 71.8 



Mean cloudiness, percent 62 



Number of clear days 3 



Number of fair days 16 



Number of cloudy days 11 



Number of hours bright sunshine 181 



Percent of possible hours of 



bright sunshine 39.6 



Thunder and lightning 8th, 9th, 24th, 2Sth 



Normal 



30.30 



29.55 



29.95 



0.75 



91.2 

 40.0 

 65.7 

 51.3 



3.75 

 11 



3585 



5.0 

 24.6 



WSW 



66.9 

 51.1 

 10 

 12 



8 

 257 



54.0 



Extremes 



30.70, 1947 

 29.24, 1902 



101, 1919 

 34, 1891 



9.68, 1922; 0.76, 1908 



17, 1922, 1945; 4, 1908 



4571, 1908; 1409, 1906 



48, 1939 



71, 1903; 28, 1908 

 22,1908,1941,1943; 1,1927 

 23, 1912; 3, 1941 

 22, 1903; 1, 1923 

 362, 1908; 102, 1903 



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

 during the month. The second column gives the averages based on observa- 

 tions 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 1947. 



