MONTHLY SUMMARY 



DECEMBER 1952 



Barometer, in inches 



(Readings reduced to sea level) 



Maximum 30.595, 4th 



Minimum 29.431, lltii 



Mean semi-daily 30.056 



Range 1,1( 4 



Air Temperature, in degrees F. 



Highest 60, 11th 



Lowest 5. 28th 



Mean 32.6 



Range 55 



Highest mean daily 50.0 



Lowest mean daily 14.5 



Mean maximum 39.7 



Mean minimum 25.5 



Greatest daily range 26. 4th 



Least daily range 5, 23rd 



Degree-days of heating load for month 998 

 Degree-days cumulative for season. . . .2292 



Precipitation, in inches 



Precipitation 4. 10 



Snow T 



Maximum precip. in 24 hrs 2.10, 11th 



Number of days with .01 or more 5 



Wind, in miles 



Total movement 3471 



Greatest daily movement 249, 1 1th 



Least daily movement 10. 8th 



Mean hourly velocity 4.6 



Maximum velocity 32, 27rh 



Wind, direction 



Prevailing direction WNW 



North, days 7 



Northeast, days 2 



East, days - 



Southeast, days 1 



South, days 3 



Southwest, days 2 



West, days 5 



Northwest, days 11 



Weather 



Mean relative humidity, percent 77.8 



Mean cloudiness, percent '')2.1 



Number of clear days 3 



Number of fair days 12 



Number of cloudy days 16 



Number of hours bright sunshine 96 



Percent of possible hours of 



bright sunshine 34.0 



Thunder and lightning 



First Snow Now 8 



Norma] 



30.66 



29.27 



30.06 



1.38 



54.3 

 1.09 



27.5 

 56.2 



1162.5 

 2494.0 



3.39 

 8.50 



10 



4710 



6.3 

 31.4 



WNW 



45.2 

 Nov. 6 



Extremes 



31.104, 1949 

 28.85, 1915 



1.78, 1895, 1.01, 1892 



65.5, 1908 



—22.5, 1917 



36.9, 1891: 17.1, 1917 



7.77, 1901; .58, 1943 

 26.50, 1902, T, 1891, 1943 



17. 1902; 4, 1892, 1943 



6694, 1925; 3239, 1918 



66, 1949 



Note — The first column in the above summary lists observations made during the month. 

 The second column lists the averages based on observations made from 1889 to 1938, 

 except that humidity lecords are based on observations made from 1929 to 1938. The 

 third column lists extremes observed from 1889 to 1951. 



