Monthly Summary 



March. 1938 



Barometer 



(Readings reduced to sea level) 



Maximum 30.45, 4th 



Minimum 29.35, 6th 



Mean semi-daily 30.008 



Range 1.10 



Air Temperature 



Highest 79, 23rd 



Lowest 0, 4th 



Mean 37.4 



Range 79 



Highest mean dailj/ 58.5, 23rd 



Lowest mean daily 14, 4th 



Mean maximum 47.5 



Mean minimum 27.3 



Greatest daily range 45, 22nd 



Least daily range 3, 30th 



Precipitation 



Precipitation. In inches 2.0'> 



Snow, in inches 1.2'^ 



Maximum precipitation in 24 hrs. 



.£8, 16th, 17th 

 Number of days on which .01 or more 



inches of precipitation fell .... 9 



Wind (miles) 



Total movement 5117 



Greatest daily movement .... 340, 27th 



Least daily movement 30, 20th 



Mean hourly velocity 6.9 



Maximum velocity, 5 min., .... 32, 8th 



Wind (direction) 



Prevailing direction v/nw 



North, days .... 2 



Northeast, days 



East, days s 2 



Southeast, days 6 



South, days 3 



Southwest, days 



West, days 5 



Northwest, days 13 



Weather 



Mean relative humidity, per cent. . 61.7 



Mean cloudiness, per cent 58 



Number of clear days 13 



Number of fair days 8 



Number of cloudy days 10 



Number of hours bright sunshine . . 189 

 Percent of possible hours of bright 



sunshine 50.9 



Thunder and lightning 



Normal 



Extremes 



30.60 



29.26 



30.02 



1.35 



63.9 



5.7 

 34.2 

 58.2 



3.68 

 8.11 



11 

 5,738 



7.7 

 29 



64.4 

 51.0 



11 

 9 



11 

 201 



54.2 



30.96, 1904 

 28.47, 1914 



2,10,1914; 0.85,1915 



79.5, 1907, 1921 

 -7.5, 1906 



7.13, 1899; 0.12, 1915 

 27, 1899; 0, 1921 



17, 1890, 1913, 1936; 3, 1915 

 7,628, 1932; 3,006, 1905 



48, 1932 



68, 1901; 27, 191.^ 



22, 1924; 3, 1901 



17, 1900; 4, 1895, 1936 



21, 1901; 1, 1915 



292, 1924; 93 1901 



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

 month. The second column gives the averages based on observations made from IBsy 

 to 1928. except that humidity records are based on observations made from 1929 to 19.S7. 

 The third column gives extremes observed from 1889 to 1937 



