MONTHLY SUMMARY 



OCTOBER 1951 



Normal 



Extremes 



Barometer, in inches 



(Readings reduced to sea level) 



Maximum 30.674, 14th 



Minimum 29.552, 28th 



Mean semi-daily 30.142 



Range _- 1 . 122 



Air Temperature, in Degrees F. 



Highest - ....82, 5th 



Lowest - -27, 14th 



Mean 54.8 



Range - 55 



Highest mean daily 72.5, 5th 



Lowest mean daily 40, 28th 



Mean ma.ximum 65.3 



Mean minimum __.. 44.2 



Greatest daily range 45, 14th 



Least daily range 4, 28th 



Degree-days of heating load for 



month 328.5 



Degree-days cumulative for season — 483 



Precipitation, in inches 



Precipitation _. — 4.66 



Snow None 



Maximum precip. in 24 hrs 1.66, 7th 



Number of days with .01 or more -8 



Wind, in miles 



Total movement 3216 



Greatest daily movement ..231, 20th 



Least daily movement 23, 2nd 



Mean hourly velocity 4.32 



Maximum velocity -.__. 28, 27th, 29th, 31st 



Wind, direction 



Prevailing direction WNW 



North, days _ - 7 



Northeast, days — 1 



East, days - — 1 



Southeast, days 3 



South, days 8 



Southwest, days — 3 



West, days - — - 



Northwest, days — - 8 



Weather 



Mean relative humidity, percent 74.8 



Mean cloudiness, percent - — 35.5 



Number of clear days -—8 



Number of fair days - 13 



Number of cloudy days 10 



Number of hours bright sunshine .192.6 

 Percent of possible hours of 



bright sunshine - 56.1 



Thunder and lightning None 



30.53 



29.42 



30.06 



1.11 



79.4 

 23.4 

 50.5 

 56.0 



3.29 

 9 



4074 



5.4 

 29.5 



W 



69.0 

 48 

 10 

 10 

 11 

 175.0 



51.3 



30.68, 1929 

 29.00, 1926 



1.47, 1926; .76, 1899 



90.5, 1908 



17, 1936 



57.4, 1947; 43.2, 1890 



8.81, 1911; .01, 1924 

 15, 1913; 1, 1897, 1924 



5,467, 1910 ; 2,540, 1894 

 42, 1937 



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. 



