MONTHLY SUMMARY 



JULY 1950 



Barometer, in inches 



(Readings reduced to sea level) 



Maximum 30.334, 15th 



Minimum 29.704, 29th 



Mean semi-daily 30.001 



Range 0.630 



Air Temperature, in Degrees F. 



Highest 91, 18th 



Lowest 46, 15th, 21st 



Mean 70.6 



Range 45 



Highest mean daily 79.5, 18th 



Lowest mean daily 59.5, 20th 



Mean maximum 82.7 



Mean minimum 58.8 



Greatest daily range 37, 2nd 



Least daily range 10, 6th 



Degree-days of heating load for month. . 

 Degree-days cumulative for season 



Precipitation, in inches 



Precipitation 2.83 



Snow 



Maximum precip. in 24 hrs 1.23, 18th 



Number of days with .01 or more 11 



Wind, in miles 



Total movement 2348 



Greatest daily movement 186, 14th 



Least daily movement 25, 8th 



Mean hourly velocity 3.2 



Maximum velocity 28, 18th, 31st 



Wind, direction 



Prevailing direction WSW 



North, days 4 



Northeast, days 



East, days 



Southeast, days 1 



South, days 10 



Southwest, days 4 



West, days 6 



Northwest, days 6 



Weather 



Mean relative humidity, percent 70 



Mean cloudiness, percent 47.7 



Number of clear days 14 



Number of fair days 13 



Number of cloudy days 4 



Number of hours bright sunshine 293.2 



Percent of possible hours of 



bright sunshine 6^.2 



Thunder and lightning 4th, 18th. 31st 



Last Snow 



Last Frost 



Normal 



30.27 



29.59 



29.96 



0.68 



93.9 

 46.4 

 70.8 

 47.7 



4.10 

 11 



34.22 



4.6 

 28.7 



SW 



68.4 



50.9 



10 



14 



7 



268 



58 



Extremes 



30.50, 1892 

 29.27, 1932 



0.97, 1892 0.47. 1938 



104, 1911 



40, 1890, 1898 



66.3, 1891, 76.0. 1949 



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, 1909, 1921; 4, 1946 



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 1938, 

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

 third column gives extremes observed from 1889 to 1949. 



