MONTHLY SUMMARY 



March, 1942 



Normal 



Extremes 



Barometer, in inches 



(Readings reduced to sea level) 



Maximum 30.40, 28tli 



Minimum 28.96, 3rd 



Mean semi-daily 29.890 



Range 1 .44 



Air Temperature, in degrees F. 



Highest 63, 8th 



Lowest 26, 27th, 29th 



Mean 39.4 



Range 37 



Highest mean daily 49.5, 9th 



Lowest mean daily 33.5, 14th 



Mean maximum 48. 1 



Mean minimum 30.7 



Greatest daily range 33, 27tl 



Least daily range 5, 6th, 14th, 17tl 



Precipitation, in inches 



Precipitation 7.89 



Snow 7.25 



Maximum precipitation in 24 



hrs. 1.82,3rd 



Number of days with .01 or more 13 



Wind, in miles 



Total movement 5774 



Greatest daily movement 436, 10th 



Least daily movement 61, 16th 



Mean hourly velocity 7 



Maximum velocity 48, 3 rd 



Wind, direction 



Prevailing direction NW 



North, days 5 



Northeast, days 1 



East, days 2 



Southeast, days 2 



South, days 4 



Southwest, days 2 



West, days 5 



Northwest, days 10 



Weather 



Mean relative humidity, percent 68.0 



Mean cloudiness, percent 55 



Number of clear days 11 



Number of fair days 13 



Number of cloudy days 7 



Number hours bright sunshine 205 



Percent of possible hours of bright 



sunshine 55.2 



Thunder and lightning 9th, 17th 



30.57 



29.24 



30.00 



1.34 



63.8 

 6.1 



34.4 

 57.6 



43.2 

 25.4 



3.70 

 7.47 



11 

 5944 



7.7 

 31.2 



WNW 



64.2 



51.8 



11 



10 



10 



199 



53.6 



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 

 8182,1896; 3006,1905 



48, 1932, 1939, 1941 



22, 1924; 3, 1901 



17, 1900; 3, 1941 



21, 1901; 1, 1915 



292, 1924; 93, 1901 



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 

 1889 to 1938, except that humidity records are based on observations made from 

 1929 to 1938. The third column gives extremes observed from 1889 to 1941. 



