MONTHLY SUMMARY 



March, 194S 



Barometer, in inches 



(Readings reduced to sea level) 



Maximum 30.87, 5th 



Minimum 29.38. 27th 



Mean semi-daily 30.087 



Range 1.49 



Air Temperature, in degrees F. 



Highest 69, 31st 



Lowest - 14, 6th 



Mean 34.9 



Range 83 



Highest mean daily 55.0, 22nd, 27th 



Lowest mean daily 10.0, 5th 



Mean maximum 46.2 



Mean minimum 23.6 



Greatest daily range 54, 6th 



lieast daily range 5, 8th 



Degree days of heating load for month. . .932 

 Degree days cumulative for season 6128 



Precipitation, in inches 



Precipitation 2.92 



Snow 15.0 



Maximum precip. in 24 hrs 0.78, 2nd 



Number of days with .01 or more 10 



Wind, in miles 



Total movement 4572 



Greatest daily movement 290, 28th 



Least daily movement 30, 10th 



Mean hourly velocity 6.1 



Maximum velocity 28, 20th 



Wind, direction 



Prevailing direction WNW 



North, days 3 



Northeast, days 1 



East, days 1 



Southeast, days 6 



South, days 5 



Southwest, days 1 



West, days 4 



Northwest, days 10 



Weather 



Mean relative humidity, percent 65.5 



Mean cloudiness, percent 85 



Number of clear days 11 



Number of fair days 6 



Number of cloudy da>'s 14 



Number of hours bright sunshine 172 



Percent of possible hours of 



bright sunshine 46.3 



Normal 



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 



64.2 



51.8 



11 



10 



10 



199 



53.6 



Extremes 



31.05, 1943 

 28.47, 1914 



2.10, 1914: 0.85,1915 



85, 1929 

 -7.5, 1906 



7.89, 1942; 0.12, 1915 

 27, 1899; 0, 1921 



17, 1890, 1913, 1936; 3, 1915 



8182, 1896,; 3006, 1905 



48, 1932, 1939, 1941, 1942 



68, 1901; 27, 1915 



22, 1924; 3, 1901 



17, 1900; 1, 1943 



21, 19al; 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 1947. 



