MONTHLY SUMMARY 



MARCH, 1951 



Barometer, in inches 



(Readings reduced to sea level) 



Maximum 30.491, 3rd 



Minimum 29. 518, 24th 



Mean semi-daily 30.076 



Range 0.973 



Air Temperalure, in Degrees F. 



Highest 65, 28th 



Lowest 17, 27th 



Mean 36.5 



Range 48 



Highest mean daily 46, 30th, 31st 



Lowest mean daily 24, 1st 



Mean maximum 44. 1 



Mean minimum 29.0 



Greatest daily range 33, 27th 



Least daily range 3, 15th 



Degree-days of heating load for month. 883.0 

 Degree-days cumulative for season 5321 



Precipitation, in inches 



Precipitation 5.13 



Snow 8.0 



Maximum precip. in 24 hrs 1.62, 30th 



Number of days with .01 or more 14 



Wind, in miles 



Total movement 4818 



Greatest daily movement 382, 11th 



Least daily movement 31, 29th 



Mean hourly velocity 6.5 



Maximum velocity 32, 10th, 1 1th 



Wind, direction 



Prevailing direction NNW 



North, days 10 



Northeast, days 



East, days 4 



Southeast, days 2 



South, days 4 



Southwest, days 2 



West, days 3 



Northwest, days 6 



Weather 



Mean relative humidity, percent 76.6 



Mean cloudiness, percent 58.9 



Number of clear days 6 



Number of fair days 10 



Numberof cloudy days 15 



Number of hours bright sunshine 119.1 



Percent of possible hours of 



bright sunshine 32.2 



Thunder 16th 



First Frost 



Normal 



30.57 



29.24 



30.04 



1.34 



63.8 



6.1 



34.4 



57.6 



43.2 

 25.4 



949 



5876 



3.70 

 7.47 



11 



5944 



1.1 

 31.2 



WNW 



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 

 -9, 1950 



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, 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 1950. 



