MONTHLY SUMMARY 



JANUARY 1953 



Barometer, in inches 



(Readings reduced to sea level) 



Maximum SO.eOS, 17th 



Minimum 29.039, 25th 



Mean semi-daily 29.994 



Range 1 .566 



Air Temperature, in degrees F. 



Highest 52, 24th 



Lowest 11, 27th 



Mean 30.4 



Range 41 



Highest mean daily 42.5, 24th 



Lowest mean daily 16.5, 27th 



Mean maximum 37.8 



Mean minimum 23.1 



Greatest daily range 27, 25th 



Least daily range 5, 8th, 10th, 11th 



Degree-days of heating load for month 1071 

 Degree-days cumulative for season. . . .3363 



Precipitation, in inches 



Precipitation 6.24 



Snow 1 1 . S 



Maximum precip. in 24 hrs 1.36 



Number of days with .01 or more 13 



Wind, in miles 



Total movement 3491 



Greatest daily movement 327, 26th 



Least daily movement 11, 20th 



Mean hourly velocity 4.07 



Maximum velocity 39, 25th 



Wind, direction 



Prevailing direction NNW 



North, days 7 



Northeast, days 



East, days 



Southeast, days 1 



South, days 5 



Southwest, days 



West, days 1 



Northwest, days 17 



Weather 



Mean relative humidity, percent H\.(i 



Mean cloudiness, percent 59.2 



Number of clear days 10 



Number of fair days 6 



Number of cloudy days 15 



Number of hours bright sunshine . . . 109.2 

 Percent of possible hours of 



bright sunshine 37.1 



Thunder and lightning 



Nor 



30.70 



29.20 



30.07 



1.50 



51.1 

 -7.1 



24.2 

 58.2 



1265 



3.61 

 13.32 



11 



5055 



6.8 

 32.7 



WNW 



Extremes 



70. 1 

 55 



9 



9 



13 



137 



46.7 



31.00, 1927 

 28.55, 1913 



2.18, 1913; 0.97, 1896 



66.0, 1932 



—26.0, 1904 



34.2, 1913; 13.9, 1918 



7.15, 1898; 1.07, 1896 

 33, 1898, 1923 1.50, '08 



17, '50, '20; 4, 1901 



7770, 1908; 2896, 1895 



47, 1938 



78, 1932; 37, 1908 



20, 1944; 1, 1949 



18, 1890, 1926; 3, 1916, 1944 



22, 1923, '31, '49; 4, 1920, '39 



214, 1920; 50.4, 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 ba.sed on observations made from 1929 to 1938. The 

 third column lists extremes observed from 1889 to 1952. 



