MONTHLY SUMMARY 



NOVEMBER 1951 



Barometer, in inches 



(Readings reduced to sea level) 



Maximum 30.784, 6th 



Minimum 29.380, 3rd 



Mean semi-daily 30.087 



Range 1.404 



Air Temperature, in Degrees F. 



Highest 66, 13th 



Lowest 8, 28th 



Mean 37.2 



Range 58 



Highest mean daily 58, 14th 



Lowest mean daily 17, 28th 



Mean maximum 46.3 



Mean minimum 28.1 



Greatest daily range 38, 22nd 



Least daily range 4, 24th 



Degree-days of heating load for 



month 833.5 



Degree-days cumulative for season. .1328.0 



Precipitation, in inches 



Precipitation 6.39 



Snow 3.0 



Maximum precip. in 24 hrs 2.04, 3rd 



Number of days with .01 or more 9 



Wind, in miles 



Total movement 4058 



Greatest daily movement 413, 27th 



Least daily movement — 17, 29th 



Mean hourly velocity 5.6 



Maximum velocity 32, 8th, 26th 



Wind, direction 



Prevailing direction N 



North, days 11 



Northeast, days 2 



East, days - 



Southeast, days 7 



South, days 



Southwest, days 2 



West, days 3 



Northwest, days 5 



Weather 



Mean relative humidity, percent 77.9 



Mean cloudiness, percent 48.8 



Number of clear days - 10 



Number of fair days -. _._ 8 



Number of cloudy days 12 



Number of hours bright sunshine 138.5 



Percent of possible hours of 



bright sunshine _ 47.4 



Thunder and lightning 



First Snow 3rd 



Normal 



783 



3.41 

 2.34 



4531 



6.3 

 30.3 



WNW 



70.6 



55.1 



6 



9 



15 



121 



41.3 



Nov. 6 



Extremes 



8.64, 1927; 0.63, 1917 

 13.50, 1938 



22, 1921 ; 2, 1904 



5,978, 1906; 2,589, 1889 



48, 1948, 1950 



78, 1947; 34, 1917 



15, 1903; 0, 1948 



16, 1912 ; 4, 1889, 1930, '32 '35 



24, 1927; 9, 1905, 1917, 1949 



182, 1903; 44, 1948 



Oct. 10, 1925 ; Dec. 13, 1941 



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 1950. 



