Monthlly Summary 



May, 1985 



Normal 



Extremes 



Barometer 



( Readings reduced to sea level) 



Maximum 30.37, 5th 



Minimum 29.51, 21st 



Mean semi-daily 29.954 



Range 0.86 



Air Temperature 



Highest 85, 27th 



Lowest 32, 16th 



Mean 54.4 



Monthly range 53 



Highest mean daily 72.5, 29th 



Lowest mean daily 41.0, 2nd 



Mean maximum 66.5 



Mean minimum 42.2 



Greatest daily range 41, 27th 



Least daily range 6, 7th 



PrecipKafioii 



Precipitation. In inches 2.17 



Snow, in inches 



Maximum precipitation in 24 hrs. 0.88, 



7th 

 Number of days on which .01 or more 



inches of rain fell 8 



Wind (miles) 



Total movement 4435 



Greatest daily movement 416, 1st 



Least daily movement 61, 23rd 



Mean hourly velocity 6.0 



Maximum velocity for 5 min., 45, 1st 



Wind (direction) 



Prevailing direction w 



North, days 1 



Northeast, days 3 



East, days 



Southeast, days 10 



South, days 2 



Southwest, days 1 



West, days 5 



Northwest, days 9 



Weather 



Mean relative humidity, per cent ... 60 



Mean cloudiness, per cent 55 



Number of clear days 11 



Number of fair days . . . , 9 



Number of cloudy days 11 



Number of hours bright sunshine . . 224 

 Percent of possible hours of bright 



sunshine 50 



Thunder and Lightning 10th, 31st 



Frosts 16th, 24th,25th 



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 



1.21, 1929; 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, 1929, 1934 



83.9, 1927; 53.8, 1932 



70, 1901; 30, 1923 



20, 1923; 0, 1927 



17, 1907, 1926; 5, 1923 



20, 1927; 3, 1903, 1922 



334, 1922; 137, 1927 



June 8, 1932; Apr. 23, 1904. 



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 18»9 to 

 t»28. The third column gives extremes observed from 1889 to 1934. 



