MONTHLY SUMMARY 



March 1941 



Barometer, in inches 



(Readings reduced to sea level) 



Maximum 30.47, 7th 



Minimum 29.36, 4th 



Mean semi-daily 29.917 



Range 1.11 



Air Temperature, in degrees F. 



Highest 54, 23rd 



Lowest 6, 18! h 



Mean 30.3 



Range 48 



Highest mean daily 41, 29th 



Lowest mean daily • 11, 18tl 



Mean maximum 39.0 



Mean minimum 21.6 



Greatest daily range 34, 14th, 15th 



Least daily range 6, 8th, 9th, 16th 



Precipitation, in inches 



Precipitation 1.63 



Snow . . . ., 15 50 



Maximum precipitation in 24 hrs. .67, 8th 



Numher of days with .01 or more 6 



Wind, in miles 



Total movement 6449 



Greatest daily movement 549, 19th 



Least daily movement 37, 24th 



Mean hourly velocity 8.7 



Maximum velocity 48, 18th 



Wind, direction 



Prevailing direction NV\ 



North, days 8 



Northeast, days 1 



East, days 



Southeast, days ] 



South, days 2 



Southwest, days 1 



West, days 2 



Northwest, days 16 



Weather 



Mean relative humidity, percent 68.2 



Mean cloudiness, percent 43 



Number of clear days 20 



Number of fair days 3 



Number of cloudy days 8 



Number hours bright sunshine 256 



Pt>rcent of possible hours of bright 



sunshine 69 



Normal 



WNW 



64 2 



51 8 



11 



10 



10 



199 



53 6 



Extremes 



22 1924; 3 19 I 



17, 1900; 4. 1895, 1897,1936 



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 1910. 



