MONTHLY SUMMARY 



July, 1945 



Barometer, in inches 



(Readings reduced to sea level) 



Maximum 30.37, 17th 



Minimum 29.67, 10th 



Mean semi-daily _ 30.024 



Range .-_-. .-- _ 0.70 



Air Temperature, in degreea F. 



Highest -92, 1st 



Lowest - — 46, 1 2th 



Mean — - 70.6 



Range 46 



Highest mean daily - 78, 26th 



Lowest mean daily — 60, 11th 



Mean maximum 80.7 



Mean minimum 60.5 



Greatest daily range 30, 12th 



Least daily range 8, 15th 



Precipitation, in inches 



Precipitation .— - -7.36 



Snow — 



Maximum precipitation in 24 hrs. 



.-1.85, 14th, 15th 



Number of days with .01 or more 16 



Wind, in miles 



Total movement 3270 



Greatest daily movement -_ —227, 15th 



Least daily movement —46, 28th 



Mean hourly velocity — ' 4.4 



Maximum velocity 28, 1st 



Wind; direction 



Prevailing direction — SE 



North, days 



Northeast, days 



East, days —5 



Southeast, days -.15 



South, days .2 



Southwest, days '. .....0 



West, days 2 



Northwest, days .7 



Weather 



Mean relative humidity, percent 73.1 



Mean cloudiness, percent .60 



Number of clear days .9 



Number of fair days 17 



Number of cloudy days 5 



Number hours bright sunshine 275 



Percent of possible hours of bright 



sunshine . 59.5 



Thunder and lightning 1st, 6th, 10th, 18th 



Normal 



30.27 



29.59 



29.96 



0.68 



93.9 



46.4 

 70.8 

 47.7 



4.10 



11 



3422 



4.6 

 28.7 



SW 



Extremes 



68.4 

 50.9 

 10 

 14 



7 

 268 



58 



30.50, 1892 

 29.27, 1932 



0.97, 1892; 0.47, 1938 



104, 1911 



40, 1890, 1898 



74.7, 1921 ; 66.3, 1891 



14.51, 1897; 0.70, 1929 



20, 1915; 4, 1924 



5097, 1909; 1109. 1894 



44, 1936 



70, 1943; 31, 1924 

 22, 1923; 0, 1915 

 24, '09, '21 ; 5, '89, '23. '28, 

 '36 



18. 1889; 0. 1910 

 371. 1910; 180, 1931 



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 19.^8. except thait humidity records are based on observations made 

 from 1929 to 19.38. The third column gives extremes observed from 1889 to 1944. 



