MONTHLY SUMMARY 



June 1941 



Normal 



Extremes 



Barometer, in inches 



(Readings reduced to sea level) 



Maximum 30.21, 12th, 13th 



Minimum 29.64, 8th 



Mean semi-daily 29.954 



Range 0.57 



Air Temperature, in degrees F. 



Highest 94, 27th 



Lowest 44, 12th 



Mean 67.2 



Range 50 



Highest mean daily 80.5, 28th, 29th 



Lowest mean daily 56.5, 5th, 13th 



Mean maximum 78.9 



Mean minimum 55.4 



Greatest daily range 37, 7th 



Least daily range 3, 5th 



Precipitation, in inches 



Precipitation 6.13 



Maximum precipitation in 24 hrs. 



2.11, 14th, 15th 



Number of days with .01 or more 11 



Wind, in miles 



Total movement 3839 



Greatest daily movement 443, 9th 



Least daily movement 38, 14th 



Mean hourly velocity 5 



Maximum velocity 32, 9th, 10th 



Wind, direction 



Prevailing direction WSW 



North, days 5 



Northeast, days 1 



East, days 



Southeast, days 5 



South, days 7 



Southwest, days 1 



West, days 5 



Northwest, days 6 



Weatlier 



Mean relative humidity, percent 70.7 



Mean cloudiness, percent 57 



Number of clear days 22 



Number of fair days 3 



Number of cloudy days 5 



Number hours bright sunshine 328 



Percent of possible hours of bright 



sunshine 718 



Thunder and lightning 14th, 15th, 17th 



23rd, 30tli 



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 



30.54, 1889 

 29.24, 1902 



101, 1919 

 34, 1891 



9.68, 1922; 0.76, 1908 



17, 1922; 4,1908 

 4571, 1908; 1409, 1906 



48, 1939 



71, 1903; 28, 1908 



22, 1908; 1, 1927 



23, 1912; 4, 1895, 1903 



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 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 1940. 



