Monthly Summary 



November, 1930 



Normal 



Extremes 



Barometer 



(Readings reduced to sea level) 



Maximum 30.78, 29th 



Minimum 29.07, 25th 



Mean semi-daily 30.182 



Range 1.71 



Air Temperature 



Highest 65, 14th, 22nd 



Lowest . 5, 29th 



Mean 40.2 



Monthly range 60 



Highest mean daily 57.5, 14th 



Lowest mean daily 17.5, 29th 



Mean maximum 49.1 



Mean minimum 31.2 



Greatest daily range . . 28, 3rd, 9th, 11th 

 Least daily range 4, 16th 



Precipitation 



Precipitation. In inches 3.42 



Snow, in inches 0.75 



Maximum precipitation in 24 hrs. 



1.22, 17th 

 Number of days on which .01 or 



more inches of rain fell 12 



Wind (miles) 



Total movement 4,054 



Greatest daily movement 413, 6th 



Least daily movement 35, 2nd 



Mean hourly velocity 5.6 



Maximum velocity for 5 min .... 39, 6th 



icoriected to conform to 3 cup anemometer) 

 Wind (direction) 



Prevailing direction wsw 



North, days 2 



Northeast, days 1 



East, days 



Southeast, days 3 



South, days 7 



Southwest, days 4 



West, days 5 



Northwest, days 8 



Weather 



Mean relative humidity, per cent. . 73.0 



Mean cloudiness, per cent 64 



Number of clear days 9 



Number of fair days 4 



Number of cloudy days 17 



Number of hours bright sunshine 116.2 

 Percent of possible hours of bright 



sunshine 40 



Thunder and lightning 

 Frosts 



30.58 



29.34 



30.046 



1.29 



65.3 

 13.8 

 38.6 

 51.4 



3.45 

 2.05 



9 



4,564 



6.3 

 29 



76.3 

 53.5 



6 



9 



15 



121.0 



41 



30.86, 1896 

 28.73, 1904 



1.84, 1904; 0.98, 1890 



75.0, 1924 

 3.5, 1891 



8.64, 1927; 0.63, 1917 

 9,24;t,89,93,03,12,18,19,22,27 



22, 1921; 2, 1904 

 5,978, 1906; 2,589, 1889 



40, 1915 



85.9, 1907; 67.8, 1890 



72, '00, '27; 34, 1917 



15, 1903; 1, 1900, 1911, 1927 



16, 1912; 4, 1889 

 24, 1927; 9, 1890, 1905, 1917 

 182, 1903; 66, 1927 



Note— The first column in the above summary gives observations made during the 

 month. The second and third columns give the averages and extremes observed from 1898 

 to 1929. 



