MONTHLY SUMMARY 



ANUARY, l'^=;i 



Barometer, in inches 



(Readings reduced to sea level) 



Maximum 30.728, 31st 



Minimum 28.996, 15th 



Mean semi-daily 30.064 



Range 1.732 



Air Temperature, in Degrees F. 



Highest 55, 4th 



Lowest — 4, 9th 



Mean 27.4 



Range 59 



Highest mean daily 44.5, 4th 



Lowest mean daily 4.5, 31st 



Mean maximum 35.9 



Mean minimum 18.9 



Greatest daily range 34, 9th 



Least daily range 7, 16th 



Degree-days of heating load for monthl 104.5 

 Degree-days cumulative for season. . . 3438.0 



Precipitation, in inches 



Precipitation 3.28 



Snow 16.2 



Maximum precip. in 24 hrs 0.91, 24th 



Number of days with .01 or more 10 



Wind, in miles 



Total movement 3755 



Greatest daily movement 338, 16th 



Least daily movement 14, 14th 



Mean hourly velocity 5.0 



Maximum velocity 32, 21st 



Wind, direction 



Prevailing direction WNW 



North, days 8 



Northeast, days 



East, days 



Southeast, days 1 



South, days 5 



Southwest, days 5 



West, days 2 



Northwest, days 10 



Weather 



Mean relative humidity, percent 79.5 



Mean cloudiness, percent 51.0 



Number of clear days 6 



Number of fair days 8 



Numberof cloudy days 17 



Number of hours bright sunshine 85.9 



Percent of possible hours of 



bright sunshine 29.2 



Thunder and lightning 



First Frost 



Normal 



30.70 



29.20 



30.07 



1.50 



51.1 

 -7.1 

 94? 



58.2 



1265 



3.61 

 13.32 



11 



5055 



6.8 

 32.7 



WNW 



70.1 



55 



9 



9 



13 



137 



46.7 



Extremes 



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 gives observations made during the month. 

 The second column gives 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 gives extremes observed from 1889 to 1950. 



