MONTHLY SUMMARY 



JULY, 1953 



Barometer, in inches 



(Readings reduced to sea level) 



Maximum 30.307, 25th 



Minimum 29,511, 2nd 



Mean semi-daily 29.981 



Range 0.796 



Air Temperature, in degrees F. 



Highest 97, 18th 



Lowest 47, 25th 



Mean 71.7 



Range 50.0 



Highest mean daily 82.0, 18th 



Lowest mean daily 61.5, 25th 



Mean maximum 83.7 



Mean minimum 59.7 



Greatest daily range 35, 5th 



Least daih range 5, 23rd 



Degree-days of heating load for month. 

 Degree-days cumulative for season. . . 



Precipitation, in incties 



Precipitation 1.95 



Snow — 



Maximum precip. in 24 hrs 0.84 



Number of days with .01 or more S 



Wind, in miles 



Total movement 2747 



Greatest daily movement 239, 3rd 



Least daily movement 33, 11th 



Mean hourly velocity 3.7 



Maximum velocity 32. 3rd 



Wind, direction 



Prevailing direction WNW 



North, days — 



Northeast, days 2 



East, days — 



Southeast, days 4 



South, days 1 



Southwest, days 3 



West, days 10 



Northwest, days 11 



Weather 



Mean relative humidity, percent 67.4 



Mean cloudiness, percent 44.0 



Number of clear days 16 



Number of fair days 13 



Number of cloudy days 2 



Number of hours bright sunshine.. . .293.4 

 Percent of possible hours of 



bright sunshine 63.3 



Thunder and lightning 8th. 9th. 20th, 



21st 



Note — The first column in the above summary lists observation* 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. 



