MONTHLY SUMMARY 



lUNE 1950 



Barometer, in inches 



(Readings reduced to sea level) 



Maximum 30.302. 7th 



Minimum 29.522, 17th 



Mean semi-dailv 29.902 



Range ' 780 



Air Temperalure, in Degrees F. 



Highest 91, 26th 



Lowest 41, 19th 



Mean 66 



Range 50 



Highest mean daily 71, 26th 



Lowest mean daily 50.5, 4th, 19th 



Mean maximum 78.1 



Mean minimum 54.1 



Greatest daily range 41, 2nd 



Least daily range 5 1st 



Degree-days of heating load for month. 68.5 

 Degree-days cumulative for season 6404 



Precipitation, in inches 



Precipitation 3.65 



Snow 



Maximum precip. in 24 hrs 1.35, 1st 



Number of days with .01 or more 10 



Wind, in miles 



Total movement 3535 



Greatest daily movement 261, 17th 



Least daily movement 13, 19th 



Mean hourly velocity 4.9 



Maximum velocity 32, 17th 



Wind, direction 



Prevailing direction W 



North, days 3 



Northeast, days 3 



East, days 



Southeast, days 



South, days 5 



Southwest, days 4 



West, days 9 



Northwest, days 6 



Weather 



Mean relative humidity, percent 67.7 



Mean cloudiness, percent 39.8 



Number of clear daj^s 11 



Number of fair days 16 



Number of cloudy days 3 



Number of hours bright sunshine 268.2 



Percent of possible hours of 



bright sunshine 58.7 



Thunder and lig' tnmg 10th, 17th. 27th 



Last Snow 



Last Frost 



Nc 



30.. 30 



29.55 



29.95 



0.75 



91.2 

 40.0 



65.7 

 51.3 



3.75 



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: 14()9, 1906 



-18. 1939 



71. 1903; 28 19()S 



22, 1908, 1941, 1943; 0, 1949 



23. 1912; 3, 1941 



22, 1903; 1. 1923 



362. !9()S; 102 1903 



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 lecords are based on observations made from 1929 to 1938. The 

 third column gives extremes observed from 1889 to 1949. 



