MONTHLY SUMMARY 



June 1942 



Barometer, in inches 



(Readings reduced to sea level) 



M aximum _....„ 30.32, 2nd 



Minimum 29.58, 14th 



Mean semi-daiily » - 29 .963 



Range „ „ „ 0.74 



Air Temperature, in degrees F. 



Highest ~ - 90, 13th 



Lowest - - 48, 3rd 



Mean — - 67.5 



Range 42. 



Highest mean daily ~ 79.5, 12th 



Lowest mean daily - 54.5, 3rd 



Mean maximum _ „ 78.0 



Mean minimum _ - 57.0 



Greatest daily range _ _ - 34, 19th 



Least daily range _ 8, 4th 



Precipitation, in inches 



Precipitation - 3.63 



Snow 



Maximum precipitation in 24 hrs 1.40, 14th 



Number of days with .01 or more „ 12 



Wind, in miles 



Total movement 3043 



Greatest daily movement 327, 15th 



Least daily movement 38, 21st 



Mean velocity _ - 4.2 



Maximum velocity 28, 15th 



Wind, direction 



Prevailing direction SW 



North, days _ 3 



Northeast, days - - - 



East, days ~ 1 



Southeast, days - 4 



South, days _ ~ 1 1 



Southwest, days — _ — 2 



West, days — 3 



Northwest, days - 6 



Weather 



Mean relative humidity, percent 73.6 



Mean cloudiness, percent 65 



Number of clear days 13 



Number of fair days „ 11 



Number of cloudy days „ 6 



Number hours bright sunshine 285 



Percent of possible hours of bright 



sunshine _.... 62.4 



Thunder and lightning 7th, 12th, 13th, 



14tli, 18th, 19th, 23rc 



Normal 



30.30 



29.55 



29.95 



0.75 



91.2 

 40.0 



65.7 

 51.3 



WSW 



Extremes 



30.54, 1889 

 29.24, 1902 



101, 1919 

 34, 1891 



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. 



