MONTHLY SUMMARY 



November 1939 



Normal 



Extremes 



Barometer, in inches 



(Readings reduced to sea level) 



Maximum 30.56, 4th 



Minimum 29.44, 1st 



Mean semi-daily 30.118 



Range 1.12 



Air Temperature, in degrees F. 



Highest 61, 16th 



Lowest 18, 14th 



Mean 36 



Range 43 



Highest mean daily 45.5, 8th 



Lowest mean daily 28, 14th 



Mean maximum 46.7 



Mean minimum 26.9 



Greatest daily range 39, 16th 



Least daily range 9, 21st, 22nd 



Precipitation, in inches 



Precipitation 98 



Snow Trace 



Max. precipitation in 24hrs. . . .93, 5th, 6th 

 Number of days with .01 or more 3 



Wind, in miles 



Total movement 4958 



Greatest daily movement 343, 11th 



Least daily movement 30. 30th 



Mean hourly velocity 6 9 



Maximum velocity 40, 9th 



Wind, direction 



Prevailing direction NW 



North, days 6 



Northeast, days 2 



East , days 



Southeast, days 



South, days 1 



Southwest, days 2 



West, days 9 



Northwest, days 10 



Weather 



Mean relative humidity, percent 67 8 



Mean cloudiness, percent 38 



Number of clear days 10 



Number of fair days 13 



Number of cloudy da>s 7 



Number hours bright sunshine 158 



Percent of possible hours of bright 



sunshine 53.9 



Thunder and lightning 



First snow No\^ 9 



3.41 

 2.34 



4531 



6.3 

 30.3 



WNW 



70.6 



55.1 



6 



9 



15 



121 



41.3 



Nov. 6 



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, 19:)3; 66, 1927 



Oct. 10, '25; Nov. 27, '31 



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 1938. 



