MONTHLY SUMMARY 



Xoven.ber, 1941 



Barometer, in inches 



(Readings reduced to sea level) 



Maximum 30.54, 28th 



Minimum 29.40, 7th 



Mean semi-daily 30.025 



Range 1.1-1 



Air Temperature, in degrees F. 



Highest 74, 19th 



Lowest 19, 25th 



Mean 42. S 



Range 55 



Highest mean daily 58.5, 20th 



Lowest mean daily 31.5, 25th 



Mean maximum 53.4 



Mean minimum 32.2 



Greatest daily range 39, 29th 



Least daily range 4, 1st 



Precipitation, in inches 



Precipitation 4.29 



Snow Trace 



Maximum precipitation in 24 hrs. 2.06, 1st 



Number of days with .01 or more 7 



Wind, in miles 



Total movement 4002 



Greatest daily movement 340, 21st 



Least daily movement 42, 23rd 



Mean hourly velocity 5.6 



Maximum velocity 40, 21st 



Wind, direction 



Prevailing direction W 



North, days 4 



Northeast, days 



East, days 



Southeast, days 3 



South, days 9 



Southwest, days 2 



West, days 3 



Northwest, days 9 



Weather 



Mean relative humidity, percent 70.7 



Mean cloudiness, percent 47 



Number of clear days 11 



Number of fair days 7 



Number of cloudy days 12 



Number hours bright sunshine 135 



Percent of possible hours of bright 



sunshine 46.1 



Thunder and lightning 



Normal 



Extremes 



30.59 



29.30 



30.05 



1.29 



66.0 

 12.9 

 38.9 

 53.0 



3.41 

 2.34 



9 

 4531 



6.3 



30.3 



WNW 



70.6 



55.1 



6 



9 



15 



121 



41.3 



30.87, 1932 

 28.73, 1904 



1.84, 1904; .94, 1905 



75, 1924, 1938 



-4, 1938 



44.1, 1931; 33.6, 1901 



8.64, 1927; .63, 1917 

 13.50, 1938 



22, 1921; 2, 1904 

 5,978,1906; 2,589,1889 



44, 1938 



72, 1900 1927; 34, 1917 



15,1903; 1, 1900,1911,1927 



16, '12; 4, '89, '30, '32, '35 



24, 1927; 9, 1905,1917 



182, 1903; 66, 1927 



Note — The first column in the above summary gives observations made dui-ing the 

 month. The second column gives the averages based on observations made from 

 1889 to 193S, except that humidity records are based on observations made from 

 1929 to 1938. The third column gives extremes observed from 1889 to 1940. 



