Monthly Summary 



May, 19H2 



Normal 



Extremes 



Barometer 



(Readings reduced to sea level) 



Maximum; 30.43, 19th 



Minimum 29.73, 13th 



Mean semi-daily 30.022 



Range 0.70 



Air Temperadire 



Highest 91, 26th 



Lowest 31, 11th 



Mean 57.9 



Monthly range 60 



Highest mean daily 77.5, 26th 



Lowest mean daily 46.5,6th 



Mean maximum 71.6 



Mean minimum 44.3 



Greatest daily range 48, 24th 



Least daily range 6, 1st 



Precipitation 



Precipitation. In inches 1.67 



Snow, in inches 



Maximum precipitation 24 hrs. .91, 1st 



Number of days on which .01 or more 

 inches of rain fell 7 



Wind (miles) 



Total movement 4,566 



Greatest daily movement 298, 3rd 



Least daily movement 69, 8th 



Mean hourly velocity 6 



Maximum velocity for 5 min.28,23rd,28th 

 (corrected to conform to '^ cup aiieiiioiueter) 



Wind (direction) 



Prevailing direction ne 



North, days 6 



Northeast, days 1 



East, days 3 



Southeast, days 8 



South, days 3 



Southwest, days 1 



West, days 2 



Northwest, days 7 



Weather 



Mean relative humidity, per cent . . 53.8 



Mean cloudiness, per cent 49.0 



Number of clear days 15 



Number of fair days 11 



Number of cloudy days 5 



Number of hours bright sunshine 290.5 

 Percent of possible hours of bright 



sunshine 64 



Thunder and Lightning 16th, 31st 



Frosts 11th, 19th, 23rd, 24th 



Last Frosts 



30.38 

 29.51 

 29.95 



85.5 

 30.8 

 56.8 

 54.6 



3.63 



12 



4,540 



6.1 

 25 



70.7 

 51.5 

 10 

 11 

 10 

 250.1 



55.2 



12th 



30.55, 1895 

 29.16, 1893 



1.16, 1893; 0.60, 1899 



94.5, 1911 

 24.0, 1900 



7.44, 1931; 0.48, 1903 



20, 1901; 5, 1903 



5,946, 1907; 2,180, 1894 



35, 1912 



83.9, 1927; 59.3, 1891 



70, 1901 ; 30, 1923 



20, 1923; 0, 1927 



17, 1907, 1926; 5, 1923 



20, 1927; 3, 1903, 1922 



334, 1922; 137, 1927 



J'e 3, 1908; Apr 23 , 1904 



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

 month. The second column (fives averayres based on observations made from 1H89 to 

 1928. The third column gives extremes observed from 1889 to 1931. 



