Monthly Summary 



January. 1937 



Barometer 



( Readings reduced to sea level) 



Maximum . 30.85, 28th 



Minimum 29.55, 3rd 



Mean semi-daily 30.253 



Range 1.30 



Air Tempera I lire 



Highest • 58, 15th 



Lowest 9, 28th 



Mean 31.7 



Annual range 49 



Highest mean daily 47, 15th 



Lo vvest mean daily 19.5, 28th 



Mean maximum 38.8 



Mean minimum 24.5 



Greatest daily range 22, 15th 



Least daily I'ange 3, 3rd 



Precipitation 



Precipitation. In inches 5.38 



Snow, in inches 9.75 



Maximum precipitation in 24 hrs. 



88, 17th 

 Number of days on which .01 or more 



inches of precipitation fell. . . .15 

 Wind (miles) 



Total movement 4,339 



Greatest daily movement 328, 16th 



Least daily movement 23, 8th 



Mean hourly velocity 5.8 



Maximum velocity, 5 Tnin., 25, 15th 



U'iiKl (direction) 



Prevailing direction nw 



North, days 5 



Noi'theast, days 



East, days 



Southeast, days 5 



South, d'ciys 2 



Southwest, days 1 



West, days ^ 



Northwest, days 12 



Weather 



Mean relative humidity, per cent. . 73.5 



Mean cloudiness, per cent 63.0 



Number of clear days 10 



Number of fair days ... 5 



Number of cloudy days 16 



Number of hours bright sunshine . . 112 

 Percent of possible hours of bright 

 sunshine 38.1 



3.42 7.15, 1898; 1.07, 1896 

 13 33,1898, 1923; 1.76, 1911 



11 



5,068 



6.8 

 30 



69.7 



54 



8 



10 



13 



140 



47.6 



18, 1923; 4, 1889 

 7,770, 1908; 2,896, 1895 



41,1911 



78, 1932; 37, 1908 



16, 1922; 2, 1914 



18, 1890,1 P?6; 3, 1916 



22, 1923, 1931; 4, 1920 



214, 1920; 74.2, 1932 



Note— The first oolnrun in the above summary gives observations made diiriny;- the 

 month. The second folumn arives the averages based on observations made from 18i*9 

 to Ut-..'8. except that humidity records are based on oljservations made from 1929 to 1936. 

 The third column gives extremes observed from 1889 to I9!iti. 



