MONTHLY SUMMARY 



January, 1949 



i Normal 



Extremes 



Barometer, in inches 



(Readings reduced to sea level) 



Maximum 30.95, 21st 



Minimum 29.37, 2nd 



Mean semi-daily 30.165 



Range 1.58 



Air Temperature, in degrees F. 



Highest 55, 6th 



Lowest 9, 30th 



Mean 31.8 



Range 46 



Highest mean daily 44.5, 6th 



Lowest mean daily 19.5, 30th 



Mean maximum 38.7 



Mean minimum 24.5 



Greatest daily range 23, 16th 



Least daily range : 3, 11th 



Degree Days of Heating Load 



for month 1265 



Degree Days cumulative for Season. .3817 



Precipitation, in inclies 



Precipitation 4.52 



Snow 14.5 



Maximum precip. in 24 hrs 1.03, 5th 



Number of days with .01 or more 11 



Wind in miles 



Total movement 3525 



Greatest daily movement 291, 20th 



Least daily movement 10, 5th 



Mean hourly velocity 4.7 



Maximum velocity ....28, 18th, 28th, 29th 



Wind, direction 



Prevailing direction NW 



North, days 7 



Northeast, days 2 



East, days 1 



Southeast-, days 3 



South, days 3 



Southwest, days 1 



West, days 5 



Northwest, days 9 



Weather 



Mean relative humidity, percent 74 



Mean cloudiness, percent 64 



Number of clear days 1 



Number of fair days 8 



Number of cloudy days 22 



Number of hours bright sunshine 50.4 



Percent of possible hours of 



bright sunshine 17.1 



Thunder and lightning — 



30.70 



29.20 



30.07 



1.50 



51.1 

 -7.1 

 24.2 



58.2 



3.61 

 13.32 



11 



5055 



-6.8 

 32.7 



WNW 



70.1 



55 



9 



9 



13 



137 



46.7 



31.00, 1927 

 28.55, 1913 



2.18, 1913; 0.97, 1896 



34.2, 



66.0, 1932 



—26.0, 1904 



1913; 13.9, 1918 



7.15, 1898; 1.07, 1896 

 33, 1898, 1923; 1.50, '08 



15, '93, '20; 4, 1901 



7770, 1908; 2896, 1895 



47, 1938 



78, 1932; 37, 1908 



20, 1944; 2, 1914 



18, 1890, 1926; 3, 1916, '44 



22, 1923, '31; 4, 1920, '39 



214, 1920; 74, 1932 



Note — The first column in the above summary gives observations made 

 during the month. The second column gives the averages based on observa- 

 tions 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. 



