MONTHLY SUMMARY 



JUNE, 1953 



Normal 



Barometer, in inches 



(Readings reduced to sea level) 



Maximum 30. 191, 28th 



Minimum 29.654, 9th 



Mean semi-daily 29.957 



Range 0.537 



Air Temperature, in degrees F. 



Highest 98,20th 



Lowest 41, 3rd 



Mean 69.1 



Range 57 



Highest mean daily 84.0, 21st 



Lowest mean daily 56.5, 3rd 



Mean maximum 83.2 



Mean minimum 54.9 



Greatest daily range 40, 15th 



Least daily range 21, 13th 



Degree-days of heating load for month. 44.5 

 Degree-days cumulative for season. . 5886.0 



Precipitation, in inches 



Precipitation 2.41 



Snow — 



Maximum precip. in 24 hrs 0.68 



Number of days with .01 or more 9 



Wind, in miles 



Total movement 2939 



Greatest daily movement 281, 10th 



Least daily movement 27, 4th 



Mean hourly velocity 4.1 



Maximum velocity 36, 9th 



Wind, direction 



Prevailing direction WNW 



North, days — 



Northeast, days 4 



East, days — 



Southeast, days 8 



South, days 1 



Southwest, days 2 



West, days 6 



Northwest, days 9 



Weather 



Mean relative humidity, percent 60.6 



Mean cloudiness, percent 47.7 



Number of clear days 19 



Number of fair days 11 



Number of cloudy days — 



Number of hours bright sunshine. . . .309.5 

 Percent of possible hours of 



bright sunshine 67.7 



Thunder and lightning 6th, 20th, 21st, 



22nd. 26th, 27th, 29th 



30.. 30 



29.55 



29.95 



0.75 



91.2 

 40.0 



65.7 

 51.3 



Extremes 



3.75 

 11 



3585 



5.0 

 24.6 



WS\\' 



66.9 



51.1 



10 



12 



8 



257 



54.0 



30.70, 1947 

 2'>.24, 1902 



101, 1919 



34. 1891 



71.'^ 1949; 4'>.5, l'^17 



9.68, 1922; 0.72, 1949 

 17. 1922, 1945: 4, 1908 



4571, 1908; 1409, 1906 

 48, 1939 



71, 1903; 28, 1908 



22. 1908. 1941 1943; 0, 1949 



23, 1912; 3. 1941 



22, 1903; 1, 1923 



365, 1947, 102. 1903 



Note — The first column in the above summary lists observations made during the month. 

 The second column lists 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 lists extremes observed from 1889 to 1952. 



